diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99a19bfdf..3d0042afe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,7 @@ option(WITH_LIBCPUID  "Use Libcpuid" ON)
 option(WITH_AEON      "CryptoNight-Lite support" ON)
 option(WITH_SUMO      "CryptoNight-Heavy support" ON)
 option(WITH_CN_PICO   "CryptoNight-Pico support" ON)
+option(WITH_CN_GPU    "CryptoNight-GPU support" ON)
 option(WITH_HTTPD     "HTTP REST API" ON)
 option(WITH_DEBUG_LOG "Enable debug log output" OFF)
 option(WITH_TLS       "Enable OpenSSL support" ON)
@@ -200,6 +201,7 @@ endif()
 
 include(cmake/OpenSSL.cmake)
 include(cmake/asm.cmake)
+include(cmake/cn-gpu.cmake)
 
 CHECK_INCLUDE_FILE (syslog.h HAVE_SYSLOG_H)
 if (HAVE_SYSLOG_H)
@@ -262,5 +264,5 @@ if (WITH_DEBUG_LOG)
     add_definitions(/DAPP_DEBUG)
 endif()
 
-add_executable(${CMAKE_PROJECT_NAME} ${HEADERS} ${SOURCES} ${SOURCES_OS} ${SOURCES_CPUID} ${HEADERS_CRYPTO} ${SOURCES_CRYPTO} ${SOURCES_SYSLOG} ${HTTPD_SOURCES} ${TLS_SOURCES} ${XMRIG_ASM_SOURCES})
+add_executable(${CMAKE_PROJECT_NAME} ${HEADERS} ${SOURCES} ${SOURCES_OS} ${SOURCES_CPUID} ${HEADERS_CRYPTO} ${SOURCES_CRYPTO} ${SOURCES_SYSLOG} ${HTTPD_SOURCES} ${TLS_SOURCES} ${XMRIG_ASM_SOURCES} ${CN_GPU_SOURCES})
 target_link_libraries(${CMAKE_PROJECT_NAME} ${XMRIG_ASM_LIBRARY} ${OPENSSL_LIBRARIES} ${UV_LIBRARIES} ${MHD_LIBRARY} ${EXTRA_LIBS} ${CPUID_LIB})
diff --git a/cmake/cn-gpu.cmake b/cmake/cn-gpu.cmake
new file mode 100644
index 000000000..0e580c565
--- /dev/null
+++ b/cmake/cn-gpu.cmake
@@ -0,0 +1,13 @@
+if (WITH_CN_GPU)
+    set(CN_GPU_SOURCES src/crypto/cn_gpu_avx.cpp src/crypto/cn_gpu_ssse3.cpp)
+
+    if (CMAKE_CXX_COMPILER_ID MATCHES GNU OR CMAKE_CXX_COMPILER_ID MATCHES Clang)
+        set_source_files_properties(src/crypto/cn_gpu_avx.cpp PROPERTIES COMPILE_FLAGS "-mavx2")
+    elseif (CMAKE_CXX_COMPILER_ID MATCHES MSVC)
+        set_source_files_properties(src/crypto/cn_gpu_avx.cpp PROPERTIES COMPILE_FLAGS "/arch:AVX")
+    endif()
+else()
+    set(CN_GPU_SOURCES "")
+
+    add_definitions(/DXMRIG_NO_CN_GPU)
+endif()
diff --git a/src/Summary.cpp b/src/Summary.cpp
index f010d70ba..dc671438e 100644
--- a/src/Summary.cpp
+++ b/src/Summary.cpp
@@ -4,9 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -74,18 +74,25 @@ static void print_cpu(xmrig::Config *config)
     using namespace xmrig;
 
     if (config->isColors()) {
-        Log::i()->text(GREEN_BOLD(" * ") WHITE_BOLD("%-13s%s (%d)") " %sx64 %sAES",
+        Log::i()->text(GREEN_BOLD(" * ") WHITE_BOLD("%-13s%s (%d)") " %sx64 %sAES %sAVX2",
                        "CPU",
                        Cpu::info()->brand(),
                        Cpu::info()->sockets(),
-                       Cpu::info()->isX64() ? "\x1B[1;32m" : "\x1B[1;31m-",
-                       Cpu::info()->hasAES() ? "\x1B[1;32m" : "\x1B[1;31m-");
+                       Cpu::info()->isX64()   ? "\x1B[1;32m" : "\x1B[1;31m-",
+                       Cpu::info()->hasAES()  ? "\x1B[1;32m" : "\x1B[1;31m-",
+                       Cpu::info()->hasAVX2() ? "\x1B[1;32m" : "\x1B[1;31m-");
 #       ifndef XMRIG_NO_LIBCPUID
         Log::i()->text(GREEN_BOLD(" * ") WHITE_BOLD("%-13s%.1f MB/%.1f MB"), "CPU L2/L3", Cpu::info()->L2() / 1024.0, Cpu::info()->L3() / 1024.0);
 #       endif
     }
     else {
-        Log::i()->text(" * %-13s%s (%d) %sx64 %sAES", "CPU", Cpu::info()->brand(), Cpu::info()->sockets(), Cpu::info()->isX64() ? "" : "-", Cpu::info()->hasAES() ? "" : "-");
+        Log::i()->text(" * %-13s%s (%d) %sx64 %sAES %sAVX2",
+                       "CPU",
+                       Cpu::info()->brand(),
+                       Cpu::info()->sockets(),
+                       Cpu::info()->isX64()   ? "" : "-",
+                       Cpu::info()->hasAES()  ? "" : "-",
+                       Cpu::info()->hasAVX2() ? "" : "-");
 #       ifndef XMRIG_NO_LIBCPUID
         Log::i()->text(" * %-13s%.1f MB/%.1f MB", "CPU L2/L3", Cpu::info()->L2() / 1024.0, Cpu::info()->L3() / 1024.0);
 #       endif
diff --git a/src/common/cpu/BasicCpuInfo.cpp b/src/common/cpu/BasicCpuInfo.cpp
index cb1e6d1de..0e6ff94aa 100644
--- a/src/common/cpu/BasicCpuInfo.cpp
+++ b/src/common/cpu/BasicCpuInfo.cpp
@@ -4,8 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -35,6 +36,10 @@
 #   define bit_AES (1 << 25)
 #endif
 
+#ifndef bit_AVX2
+#   define bit_AVX2 (1 << 5)
+#endif
+
 
 #include "common/cpu/BasicCpuInfo.h"
 
@@ -93,10 +98,20 @@ static inline bool has_aes_ni()
 }
 
 
+static inline bool has_avx2()
+{
+    int32_t cpu_info[4] = { 0 };
+    cpuid(EXTENDED_FEATURES, cpu_info);
+
+    return (cpu_info[EBX_Reg] & bit_AVX2) != 0;
+}
+
+
 xmrig::BasicCpuInfo::BasicCpuInfo() :
     m_assembly(ASM_NONE),
-    m_aes(has_aes_ni()),
     m_brand(),
+    m_aes(has_aes_ni()),
+    m_avx2(has_avx2()),
     m_threads(std::thread::hardware_concurrency())
 {
     cpu_brand_string(m_brand);
diff --git a/src/common/cpu/BasicCpuInfo.h b/src/common/cpu/BasicCpuInfo.h
index 911674ea1..2e0b3d0de 100644
--- a/src/common/cpu/BasicCpuInfo.h
+++ b/src/common/cpu/BasicCpuInfo.h
@@ -4,8 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -41,6 +42,7 @@ protected:
 
     inline Assembly assembly() const override       { return m_assembly; }
     inline bool hasAES() const override             { return m_aes; }
+    inline bool hasAVX2() const override            { return m_avx2; }
     inline bool isSupported() const override        { return true; }
     inline const char *brand() const override       { return m_brand; }
     inline int32_t cores() const override           { return -1; }
@@ -58,8 +60,9 @@ protected:
 
 private:
     Assembly m_assembly;
-    bool m_aes;
     char m_brand[64];
+    const bool m_aes;
+    const bool m_avx2;
     int32_t m_threads;
 };
 
diff --git a/src/common/crypto/Algorithm.cpp b/src/common/crypto/Algorithm.cpp
index 6d408cd2f..9d424c575 100644
--- a/src/common/crypto/Algorithm.cpp
+++ b/src/common/crypto/Algorithm.cpp
@@ -86,6 +86,10 @@ static AlgoData const algorithms[] = {
     { "cryptonight-ultralite",  "cn-ultralite",  xmrig::CRYPTONIGHT_PICO, xmrig::VARIANT_TRTL },
     { "cryptonight_turtle",     "cn_turtle",     xmrig::CRYPTONIGHT_PICO, xmrig::VARIANT_TRTL },
 #   endif
+
+#   ifndef XMRIG_NO_CN_GPU
+    { "cryptonight/gpu",        "cn/gpu",  xmrig::CRYPTONIGHT, xmrig::VARIANT_GPU },
+#   endif
 };
 
 
@@ -120,7 +124,8 @@ static const char *variants[] = {
     "rto",
     "2",
     "half",
-    "trtl"
+    "trtl",
+    "gpu"
 };
 
 
diff --git a/src/common/interfaces/ICpuInfo.h b/src/common/interfaces/ICpuInfo.h
index 267616d0a..dd4034b33 100644
--- a/src/common/interfaces/ICpuInfo.h
+++ b/src/common/interfaces/ICpuInfo.h
@@ -4,7 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2016-2018 XMRig       <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -40,6 +42,7 @@ public:
     virtual ~ICpuInfo() {}
 
     virtual bool hasAES() const                                               = 0;
+    virtual bool hasAVX2() const                                              = 0;
     virtual bool isSupported() const                                          = 0;
     virtual bool isX64() const                                                = 0;
     virtual const char *brand() const                                         = 0;
diff --git a/src/common/net/Pool.cpp b/src/common/net/Pool.cpp
index 7e8fa1dc1..2010aade6 100644
--- a/src/common/net/Pool.cpp
+++ b/src/common/net/Pool.cpp
@@ -4,7 +4,7 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
  * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
  * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
@@ -419,6 +419,7 @@ void Pool::rebuild()
     addVariant(xmrig::VARIANT_XHV);
     addVariant(xmrig::VARIANT_XAO);
     addVariant(xmrig::VARIANT_RTO);
+    addVariant(xmrig::VARIANT_GPU);
     addVariant(xmrig::VARIANT_AUTO);
 #   endif
 }
diff --git a/src/common/xmrig.h b/src/common/xmrig.h
index b20513318..d738028f0 100644
--- a/src/common/xmrig.h
+++ b/src/common/xmrig.h
@@ -73,6 +73,7 @@ enum Variant {
     VARIANT_2    = 8,  // CryptoNight variant 2
     VARIANT_HALF = 9,  // CryptoNight variant 2 with half iterations (Masari/Stellite)
     VARIANT_TRTL = 10, // CryptoNight Turtle (TRTL)
+    VARIANT_GPU  = 11, // CryptoNight-GPU (Ryo)
     VARIANT_MAX
 };
 
diff --git a/src/core/cpu/AdvancedCpuInfo.cpp b/src/core/cpu/AdvancedCpuInfo.cpp
index a91521361..c41378e53 100644
--- a/src/core/cpu/AdvancedCpuInfo.cpp
+++ b/src/core/cpu/AdvancedCpuInfo.cpp
@@ -4,9 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -33,6 +33,7 @@
 xmrig::AdvancedCpuInfo::AdvancedCpuInfo() :
     m_assembly(ASM_NONE),
     m_aes(false),
+    m_avx2(false),
     m_L2_exclusive(false),
     m_brand(),
     m_cores(0),
@@ -83,6 +84,8 @@ xmrig::AdvancedCpuInfo::AdvancedCpuInfo() :
             m_assembly = ASM_INTEL;
         }
     }
+
+    m_avx2 = data.flags[CPU_FEATURE_AVX2];
 }
 
 
diff --git a/src/core/cpu/AdvancedCpuInfo.h b/src/core/cpu/AdvancedCpuInfo.h
index 5e8967ad2..0765da339 100644
--- a/src/core/cpu/AdvancedCpuInfo.h
+++ b/src/core/cpu/AdvancedCpuInfo.h
@@ -4,8 +4,9 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -41,6 +42,7 @@ protected:
 
     inline Assembly assembly() const override       { return m_assembly; }
     inline bool hasAES() const override             { return m_aes; }
+    inline bool hasAVX2() const override            { return m_avx2; }
     inline bool isSupported() const override        { return true; }
     inline const char *brand() const override       { return m_brand; }
     inline int32_t cores() const override           { return m_cores; }
@@ -59,6 +61,7 @@ protected:
 private:
     Assembly m_assembly;
     bool m_aes;
+    bool m_avx2;
     bool m_L2_exclusive;
     char m_brand[64];
     int32_t m_cores;
diff --git a/src/crypto/CryptoNight_constants.h b/src/crypto/CryptoNight_constants.h
index 654e37409..3feb5697f 100644
--- a/src/crypto/CryptoNight_constants.h
+++ b/src/crypto/CryptoNight_constants.h
@@ -4,7 +4,7 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
  * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
  * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
  * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
@@ -42,6 +42,9 @@ constexpr const uint32_t CRYPTONIGHT_ITER         = 0x80000;
 constexpr const uint32_t CRYPTONIGHT_HALF_ITER    = 0x40000;
 constexpr const uint32_t CRYPTONIGHT_XAO_ITER     = 0x100000;
 
+constexpr const uint32_t CRYPTONIGHT_GPU_ITER     = 0xC000;
+constexpr const uint32_t CRYPTONIGHT_GPU_MASK     = 0x1FFFC0;
+
 constexpr const size_t   CRYPTONIGHT_LITE_MEMORY  = 1 * 1024 * 1024;
 constexpr const uint32_t CRYPTONIGHT_LITE_MASK    = 0xFFFF0;
 constexpr const uint32_t CRYPTONIGHT_LITE_ITER    = 0x40000;
@@ -127,6 +130,7 @@ template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT, VARIANT_HALF>()
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT, VARIANT_MSR>()        { return CRYPTONIGHT_HALF_ITER; }
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT, VARIANT_XAO>()        { return CRYPTONIGHT_XAO_ITER; }
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT, VARIANT_RTO>()        { return CRYPTONIGHT_ITER; }
+template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT, VARIANT_GPU>()        { return CRYPTONIGHT_GPU_ITER; }
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT_LITE, VARIANT_0>()     { return CRYPTONIGHT_LITE_ITER; }
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT_LITE, VARIANT_1>()     { return CRYPTONIGHT_LITE_ITER; }
 template<> inline constexpr uint32_t cn_select_iter<CRYPTONIGHT_HEAVY, VARIANT_0>()    { return CRYPTONIGHT_HEAVY_ITER; }
@@ -142,6 +146,9 @@ inline uint32_t cn_select_iter(Algo algorithm, Variant variant)
     case VARIANT_HALF:
         return CRYPTONIGHT_HALF_ITER;
 
+    case VARIANT_GPU:
+        return CRYPTONIGHT_GPU_ITER;
+
     case VARIANT_RTO:
         return CRYPTONIGHT_XAO_ITER;
 
@@ -183,6 +190,7 @@ template<> inline constexpr Variant cn_base_variant<VARIANT_RTO>()   { return VA
 template<> inline constexpr Variant cn_base_variant<VARIANT_2>()     { return VARIANT_2; }
 template<> inline constexpr Variant cn_base_variant<VARIANT_HALF>()  { return VARIANT_2; }
 template<> inline constexpr Variant cn_base_variant<VARIANT_TRTL>()  { return VARIANT_2; }
+template<> inline constexpr Variant cn_base_variant<VARIANT_GPU>()   { return VARIANT_GPU; }
 
 
 } /* namespace xmrig */
diff --git a/src/crypto/CryptoNight_test.h b/src/crypto/CryptoNight_test.h
index ed2c9e0ad..aadddc2eb 100644
--- a/src/crypto/CryptoNight_test.h
+++ b/src/crypto/CryptoNight_test.h
@@ -272,4 +272,21 @@ const static uint8_t test_output_pico_trtl[160] = {
 #endif
 
 
+#ifndef XMRIG_NO_CN_GPU
+// "cn/gpu"
+const static uint8_t test_output_gpu[160] = {
+    0xE5, 0x5C, 0xB2, 0x3E, 0x51, 0x64, 0x9A, 0x59, 0xB1, 0x27, 0xB9, 0x6B, 0x51, 0x5F, 0x2B, 0xF7,
+    0xBF, 0xEA, 0x19, 0x97, 0x41, 0xA0, 0x21, 0x6C, 0xF8, 0x38, 0xDE, 0xD0, 0x6E, 0xFF, 0x82, 0xDF,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+#endif
+
+
 #endif /* XMRIG_CRYPTONIGHT_TEST_H */
diff --git a/src/crypto/CryptoNight_x86.h b/src/crypto/CryptoNight_x86.h
index a8c2c309c..2d1aef0d6 100644
--- a/src/crypto/CryptoNight_x86.h
+++ b/src/crypto/CryptoNight_x86.h
@@ -4,7 +4,7 @@
  * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
  * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
  * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
  * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
@@ -35,6 +35,7 @@
 #endif
 
 
+#include "common/cpu/Cpu.h"
 #include "common/crypto/keccak.h"
 #include "crypto/CryptoNight.h"
 #include "crypto/CryptoNight_constants.h"
@@ -289,6 +290,34 @@ static inline void cn_explode_scratchpad(const __m128i *input, __m128i *output)
 }
 
 
+#ifndef XMRIG_NO_CN_GPU
+template<xmrig::Algo ALGO, size_t MEM>
+void cn_explode_scratchpad_gpu(const uint8_t *input, uint8_t *output)
+{
+    constexpr size_t hash_size = 200; // 25x8 bytes
+    alignas(16) uint64_t hash[25];
+
+    for (uint64_t i = 0; i < MEM / 512; i++)
+    {
+        memcpy(hash, input, hash_size);
+        hash[0] ^= i;
+
+        xmrig::keccakf(hash, 24);
+        memcpy(output, hash, 160);
+        output += 160;
+
+        xmrig::keccakf(hash, 24);
+        memcpy(output, hash, 176);
+        output += 176;
+
+        xmrig::keccakf(hash, 24);
+        memcpy(output, hash, 176);
+        output += 176;
+    }
+}
+#endif
+
+
 template<xmrig::Algo ALGO, size_t MEM, bool SOFT_AES>
 static inline void cn_implode_scratchpad(const __m128i *input, __m128i *output)
 {
@@ -566,6 +595,41 @@ inline void cryptonight_single_hash(const uint8_t *__restrict__ input, size_t si
 }
 
 
+#ifndef XMRIG_NO_CN_GPU
+template<size_t ITER, uint32_t MASK>
+void cn_gpu_inner_avx(const uint8_t *spad, uint8_t *lpad);
+
+
+template<size_t ITER, uint32_t MASK>
+void cn_gpu_inner_ssse3(const uint8_t *spad, uint8_t *lpad);
+
+
+template<xmrig::Algo ALGO, bool SOFT_AES, xmrig::Variant VARIANT>
+inline void cryptonight_single_hash_gpu(const uint8_t *__restrict__ input, size_t size, uint8_t *__restrict__ output, cryptonight_ctx **__restrict__ ctx)
+{
+    constexpr size_t MASK         = xmrig::CRYPTONIGHT_GPU_MASK;
+    constexpr size_t ITERATIONS   = xmrig::cn_select_iter<ALGO, VARIANT>();
+    constexpr size_t MEM          = xmrig::cn_select_memory<ALGO>();
+
+    static_assert(MASK > 0 && ITERATIONS > 0 && MEM > 0, "unsupported algorithm/variant");
+
+    xmrig::keccak(input, size, ctx[0]->state);
+    cn_explode_scratchpad_gpu<ALGO, MEM>(ctx[0]->state, ctx[0]->memory);
+
+    if (xmrig::Cpu::info()->hasAVX2()) {
+        cn_gpu_inner_avx<ITERATIONS, MASK>(ctx[0]->state, ctx[0]->memory);
+    } else {
+        cn_gpu_inner_ssse3<ITERATIONS, MASK>(ctx[0]->state, ctx[0]->memory);
+    }
+
+    cn_implode_scratchpad<xmrig::CRYPTONIGHT_HEAVY, MEM, SOFT_AES>((__m128i*) ctx[0]->memory, (__m128i*) ctx[0]->state);
+
+    xmrig::keccakf((uint64_t*) ctx[0]->state, 24);
+    memcpy(output, ctx[0]->state, 32);
+}
+#endif
+
+
 #ifndef XMRIG_NO_ASM
 extern "C" void cnv2_mainloop_ivybridge_asm(cryptonight_ctx *ctx);
 extern "C" void cnv2_mainloop_ryzen_asm(cryptonight_ctx *ctx);
diff --git a/src/crypto/cn_gpu_avx.cpp b/src/crypto/cn_gpu_avx.cpp
new file mode 100644
index 000000000..a808e34ce
--- /dev/null
+++ b/src/crypto/cn_gpu_avx.cpp
@@ -0,0 +1,203 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "crypto/CryptoNight_constants.h"
+
+#ifdef __GNUC__
+#   include <x86intrin.h>
+#else
+#   include <intrin.h>
+#   define __restrict__ __restrict
+#endif
+
+inline void prep_dv_avx(__m256i* idx, __m256i& v, __m256& n01)
+{
+    v = _mm256_load_si256(idx);
+    n01 = _mm256_cvtepi32_ps(v);
+}
+
+inline __m256 fma_break(const __m256& x) 
+{ 
+    // Break the dependency chain by setitng the exp to ?????01 
+    __m256 xx = _mm256_and_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0xFEFFFFFF)), x); 
+    return _mm256_or_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x00800000)), xx); 
+}
+
+// 14
+inline void sub_round(const __m256& n0, const __m256& n1, const __m256& n2, const __m256& n3, const __m256& rnd_c, __m256& n, __m256& d, __m256& c)
+{
+    __m256 nn = _mm256_mul_ps(n0, c);
+    nn = _mm256_mul_ps(_mm256_add_ps(n1, c), _mm256_mul_ps(nn, nn));
+    nn = fma_break(nn);
+    n = _mm256_add_ps(n, nn);
+
+    __m256 dd = _mm256_mul_ps(n2, c);
+    dd = _mm256_mul_ps(_mm256_sub_ps(n3, c), _mm256_mul_ps(dd, dd));
+    dd = fma_break(dd);
+    d = _mm256_add_ps(d, dd);
+
+    //Constant feedback
+    c = _mm256_add_ps(c, rnd_c);
+    c = _mm256_add_ps(c, _mm256_set1_ps(0.734375f));
+    __m256 r = _mm256_add_ps(nn, dd);
+    r = _mm256_and_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x807FFFFF)), r);
+    r = _mm256_or_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x40000000)), r);
+    c = _mm256_add_ps(c, r);
+}
+
+// 14*8 + 2 = 112
+inline void round_compute(const __m256& n0, const __m256& n1, const __m256& n2, const __m256& n3, const __m256& rnd_c, __m256& c, __m256& r)
+{
+    __m256 n = _mm256_setzero_ps(), d = _mm256_setzero_ps();
+
+    sub_round(n0, n1, n2, n3, rnd_c, n, d, c);
+    sub_round(n1, n2, n3, n0, rnd_c, n, d, c);
+    sub_round(n2, n3, n0, n1, rnd_c, n, d, c);
+    sub_round(n3, n0, n1, n2, rnd_c, n, d, c);
+    sub_round(n3, n2, n1, n0, rnd_c, n, d, c);
+    sub_round(n2, n1, n0, n3, rnd_c, n, d, c);
+    sub_round(n1, n0, n3, n2, rnd_c, n, d, c);
+    sub_round(n0, n3, n2, n1, rnd_c, n, d, c);
+
+    // Make sure abs(d) > 2.0 - this prevents division by zero and accidental overflows by division by < 1.0
+    d = _mm256_and_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0xFF7FFFFF)), d);
+    d = _mm256_or_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x40000000)), d);
+    r = _mm256_add_ps(r, _mm256_div_ps(n, d));
+}
+
+// 112×4 = 448
+template <bool add>
+inline __m256i double_comupte(const __m256& n0, const __m256& n1, const __m256& n2, const __m256& n3, 
+                              float lcnt, float hcnt, const __m256& rnd_c, __m256& sum)
+{
+    __m256 c = _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_set1_ps(lcnt)), _mm_set1_ps(hcnt), 1);
+    __m256 r = _mm256_setzero_ps();
+
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+
+    // do a quick fmod by setting exp to 2
+    r = _mm256_and_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x807FFFFF)), r);
+    r = _mm256_or_ps(_mm256_castsi256_ps(_mm256_set1_epi32(0x40000000)), r);
+
+    if(add)
+        sum = _mm256_add_ps(sum, r);
+    else
+        sum = r;
+
+    r = _mm256_mul_ps(r, _mm256_set1_ps(536870880.0f)); // 35
+    return _mm256_cvttps_epi32(r);
+}
+
+template <size_t rot>
+inline void double_comupte_wrap(const __m256& n0, const __m256& n1, const __m256& n2, const __m256& n3, 
+                                float lcnt, float hcnt, const __m256& rnd_c, __m256& sum, __m256i& out)
+{
+    __m256i r = double_comupte<rot % 2 != 0>(n0, n1, n2, n3, lcnt, hcnt, rnd_c, sum);
+    if(rot != 0)
+        r = _mm256_or_si256(_mm256_bslli_epi128(r, 16 - rot), _mm256_bsrli_epi128(r, rot));
+
+    out = _mm256_xor_si256(out, r);
+}
+
+template<uint32_t MASK>
+inline __m256i* scratchpad_ptr(uint8_t* lpad, uint32_t idx, size_t n) { return reinterpret_cast<__m256i*>(lpad + (idx & MASK) + n*16); }
+
+template<size_t ITER, uint32_t MASK>
+void cn_gpu_inner_avx(const uint8_t* spad, uint8_t* lpad)
+{
+    uint32_t s = reinterpret_cast<const uint32_t*>(spad)[0] >> 8;
+    __m256i* idx0 = scratchpad_ptr<MASK>(lpad, s, 0);
+    __m256i* idx2 = scratchpad_ptr<MASK>(lpad, s, 2);
+    __m256 sum0 = _mm256_setzero_ps();
+
+    for(size_t i = 0; i < ITER; i++)
+    {
+        __m256i v01, v23;
+        __m256 suma, sumb, sum1;
+        __m256 rc = sum0;
+
+        __m256 n01, n23;
+        prep_dv_avx(idx0, v01, n01);
+        prep_dv_avx(idx2, v23, n23);
+        
+        __m256i out, out2;
+        __m256 n10, n22, n33;
+        n10 = _mm256_permute2f128_ps(n01, n01, 0x01);
+        n22 = _mm256_permute2f128_ps(n23, n23, 0x00);
+        n33 = _mm256_permute2f128_ps(n23, n23, 0x11);
+        
+        out = _mm256_setzero_si256();
+        double_comupte_wrap<0>(n01, n10, n22, n33, 1.3437500f, 1.4296875f, rc, suma, out);
+        double_comupte_wrap<1>(n01, n22, n33, n10, 1.2812500f, 1.3984375f, rc, suma, out);
+        double_comupte_wrap<2>(n01, n33, n10, n22, 1.3593750f, 1.3828125f, rc, sumb, out);
+        double_comupte_wrap<3>(n01, n33, n22, n10, 1.3671875f, 1.3046875f, rc, sumb, out);
+        _mm256_store_si256(idx0, _mm256_xor_si256(v01, out));
+        sum0 = _mm256_add_ps(suma, sumb);
+        out2 = out;
+        
+        __m256 n11, n02, n30;
+        n11 = _mm256_permute2f128_ps(n01, n01, 0x11);
+        n02 = _mm256_permute2f128_ps(n01, n23, 0x20);
+        n30 = _mm256_permute2f128_ps(n01, n23, 0x03);
+
+        out = _mm256_setzero_si256();
+        double_comupte_wrap<0>(n23, n11, n02, n30, 1.4140625f, 1.3203125f, rc, suma, out);
+        double_comupte_wrap<1>(n23, n02, n30, n11, 1.2734375f, 1.3515625f, rc, suma, out);
+        double_comupte_wrap<2>(n23, n30, n11, n02, 1.2578125f, 1.3359375f, rc, sumb, out);
+        double_comupte_wrap<3>(n23, n30, n02, n11, 1.2890625f, 1.4609375f, rc, sumb, out);
+        _mm256_store_si256(idx2, _mm256_xor_si256(v23, out));
+        sum1 = _mm256_add_ps(suma, sumb);
+
+        out2 = _mm256_xor_si256(out2, out);
+        out2 = _mm256_xor_si256(_mm256_permute2x128_si256(out2,out2,0x41), out2);
+        suma = _mm256_permute2f128_ps(sum0, sum1, 0x30);
+        sumb = _mm256_permute2f128_ps(sum0, sum1, 0x21);
+        sum0 = _mm256_add_ps(suma, sumb);
+        sum0 = _mm256_add_ps(sum0, _mm256_permute2f128_ps(sum0, sum0, 0x41));
+
+        // Clear the high 128 bits
+        __m128 sum = _mm256_castps256_ps128(sum0);
+
+        sum = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0x7fffffff)), sum); // take abs(va) by masking the float sign bit
+        // vs range 0 - 64 
+        __m128i v0 = _mm_cvttps_epi32(_mm_mul_ps(sum, _mm_set1_ps(16777216.0f)));
+        v0 = _mm_xor_si128(v0, _mm256_castsi256_si128(out2));
+        __m128i v1 = _mm_shuffle_epi32(v0, _MM_SHUFFLE(0, 1, 2, 3));
+        v0 = _mm_xor_si128(v0, v1);
+        v1 = _mm_shuffle_epi32(v0, _MM_SHUFFLE(0, 1, 0, 1));
+        v0 = _mm_xor_si128(v0, v1);
+
+        // vs is now between 0 and 1
+        sum = _mm_div_ps(sum, _mm_set1_ps(64.0f));
+        sum0 = _mm256_insertf128_ps(_mm256_castps128_ps256(sum), sum, 1);
+        uint32_t n = _mm_cvtsi128_si32(v0);
+        idx0 = scratchpad_ptr<MASK>(lpad, n, 0);
+        idx2 = scratchpad_ptr<MASK>(lpad, n, 2);
+    }
+}
+
+template void cn_gpu_inner_avx<xmrig::CRYPTONIGHT_GPU_ITER, xmrig::CRYPTONIGHT_GPU_MASK>(const uint8_t* spad, uint8_t* lpad);
diff --git a/src/crypto/cn_gpu_ssse3.cpp b/src/crypto/cn_gpu_ssse3.cpp
new file mode 100644
index 000000000..d986752cb
--- /dev/null
+++ b/src/crypto/cn_gpu_ssse3.cpp
@@ -0,0 +1,210 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "crypto/CryptoNight_constants.h"
+
+#ifdef __GNUC__
+#   include <x86intrin.h>
+#else
+#   include <intrin.h>
+#   define __restrict__ __restrict
+#endif
+
+inline void prep_dv(__m128i* idx, __m128i& v, __m128& n)
+{
+    v = _mm_load_si128(idx);
+    n = _mm_cvtepi32_ps(v);
+}
+
+inline __m128 fma_break(__m128 x) 
+{ 
+    // Break the dependency chain by setitng the exp to ?????01 
+    x = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0xFEFFFFFF)), x); 
+    return _mm_or_ps(_mm_castsi128_ps(_mm_set1_epi32(0x00800000)), x); 
+}
+
+// 14
+inline void sub_round(__m128 n0, __m128 n1, __m128 n2, __m128 n3, __m128 rnd_c, __m128& n, __m128& d, __m128& c)
+{
+    n1 = _mm_add_ps(n1, c);
+    __m128 nn = _mm_mul_ps(n0, c);
+    nn = _mm_mul_ps(n1, _mm_mul_ps(nn,nn));
+    nn = fma_break(nn);
+    n = _mm_add_ps(n, nn);
+
+    n3 = _mm_sub_ps(n3, c);
+    __m128 dd = _mm_mul_ps(n2, c);
+    dd = _mm_mul_ps(n3, _mm_mul_ps(dd,dd));
+    dd = fma_break(dd);
+    d = _mm_add_ps(d, dd);
+
+    //Constant feedback
+    c = _mm_add_ps(c, rnd_c);
+    c = _mm_add_ps(c, _mm_set1_ps(0.734375f));
+    __m128 r = _mm_add_ps(nn, dd);
+    r = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0x807FFFFF)), r);
+    r = _mm_or_ps(_mm_castsi128_ps(_mm_set1_epi32(0x40000000)), r);
+    c = _mm_add_ps(c, r);
+}
+
+// 14*8 + 2 = 112
+inline void round_compute(__m128 n0, __m128 n1, __m128 n2, __m128 n3, __m128 rnd_c, __m128& c, __m128& r)
+{
+    __m128 n = _mm_setzero_ps(), d = _mm_setzero_ps();
+
+    sub_round(n0, n1, n2, n3, rnd_c, n, d, c);
+    sub_round(n1, n2, n3, n0, rnd_c, n, d, c);
+    sub_round(n2, n3, n0, n1, rnd_c, n, d, c);
+    sub_round(n3, n0, n1, n2, rnd_c, n, d, c);
+    sub_round(n3, n2, n1, n0, rnd_c, n, d, c);
+    sub_round(n2, n1, n0, n3, rnd_c, n, d, c);
+    sub_round(n1, n0, n3, n2, rnd_c, n, d, c);
+    sub_round(n0, n3, n2, n1, rnd_c, n, d, c);
+
+    // Make sure abs(d) > 2.0 - this prevents division by zero and accidental overflows by division by < 1.0
+    d = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0xFF7FFFFF)), d);
+    d = _mm_or_ps(_mm_castsi128_ps(_mm_set1_epi32(0x40000000)), d);
+    r =_mm_add_ps(r, _mm_div_ps(n,d));
+}
+
+// 112×4 = 448
+template<bool add>
+inline __m128i single_comupte(__m128 n0, __m128 n1,  __m128 n2,  __m128 n3, float cnt, __m128 rnd_c, __m128& sum)
+{
+    __m128 c = _mm_set1_ps(cnt);
+    __m128 r = _mm_setzero_ps();
+
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+    round_compute(n0, n1, n2, n3, rnd_c, c, r);
+
+    // do a quick fmod by setting exp to 2
+    r = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0x807FFFFF)), r);
+    r = _mm_or_ps(_mm_castsi128_ps(_mm_set1_epi32(0x40000000)), r);
+
+    if(add)
+        sum = _mm_add_ps(sum, r);
+    else
+        sum = r;
+
+    r = _mm_mul_ps(r, _mm_set1_ps(536870880.0f)); // 35
+    return _mm_cvttps_epi32(r);
+}
+
+template<size_t rot>
+inline void single_comupte_wrap(__m128 n0, __m128 n1, __m128 n2,  __m128 n3, float cnt, __m128 rnd_c, __m128& sum, __m128i& out)
+{
+    __m128i r = single_comupte<rot % 2 != 0>(n0, n1, n2, n3, cnt, rnd_c, sum);
+    if(rot != 0)
+        r = _mm_or_si128(_mm_slli_si128(r, 16 - rot), _mm_srli_si128(r, rot));
+    out = _mm_xor_si128(out, r);
+}
+
+template<uint32_t MASK>
+inline __m128i* scratchpad_ptr(uint8_t* lpad, uint32_t idx, size_t n) { return reinterpret_cast<__m128i*>(lpad + (idx & MASK) + n*16); }
+
+template<size_t ITER, uint32_t MASK>
+void cn_gpu_inner_ssse3(const uint8_t* spad, uint8_t* lpad)
+{
+    uint32_t s = reinterpret_cast<const uint32_t*>(spad)[0] >> 8;
+    __m128i* idx0 = scratchpad_ptr<MASK>(lpad, s, 0);
+    __m128i* idx1 = scratchpad_ptr<MASK>(lpad, s, 1);
+    __m128i* idx2 = scratchpad_ptr<MASK>(lpad, s, 2);
+    __m128i* idx3 = scratchpad_ptr<MASK>(lpad, s, 3);
+    __m128 sum0 = _mm_setzero_ps();
+    
+    for(size_t i = 0; i < ITER; i++)
+    {
+        __m128 n0, n1, n2, n3;
+        __m128i v0, v1, v2, v3;
+        __m128 suma, sumb, sum1, sum2, sum3;
+        
+        prep_dv(idx0, v0, n0);
+        prep_dv(idx1, v1, n1);
+        prep_dv(idx2, v2, n2);
+        prep_dv(idx3, v3, n3);
+        __m128 rc = sum0;
+
+        __m128i out, out2;
+        out = _mm_setzero_si128();
+        single_comupte_wrap<0>(n0, n1, n2, n3, 1.3437500f, rc, suma, out);
+        single_comupte_wrap<1>(n0, n2, n3, n1, 1.2812500f, rc, suma, out);
+        single_comupte_wrap<2>(n0, n3, n1, n2, 1.3593750f, rc, sumb, out);
+        single_comupte_wrap<3>(n0, n3, n2, n1, 1.3671875f, rc, sumb, out);
+        sum0 = _mm_add_ps(suma, sumb);
+        _mm_store_si128(idx0, _mm_xor_si128(v0, out));
+        out2 = out;
+    
+        out = _mm_setzero_si128();
+        single_comupte_wrap<0>(n1, n0, n2, n3, 1.4296875f, rc, suma, out);
+        single_comupte_wrap<1>(n1, n2, n3, n0, 1.3984375f, rc, suma, out);
+        single_comupte_wrap<2>(n1, n3, n0, n2, 1.3828125f, rc, sumb, out);
+        single_comupte_wrap<3>(n1, n3, n2, n0, 1.3046875f, rc, sumb, out);
+        sum1 = _mm_add_ps(suma, sumb);
+        _mm_store_si128(idx1, _mm_xor_si128(v1, out));
+        out2 = _mm_xor_si128(out2, out);
+
+        out = _mm_setzero_si128();
+        single_comupte_wrap<0>(n2, n1, n0, n3, 1.4140625f, rc, suma, out);
+        single_comupte_wrap<1>(n2, n0, n3, n1, 1.2734375f, rc, suma, out);
+        single_comupte_wrap<2>(n2, n3, n1, n0, 1.2578125f, rc, sumb, out);
+        single_comupte_wrap<3>(n2, n3, n0, n1, 1.2890625f, rc, sumb, out);
+        sum2 = _mm_add_ps(suma, sumb);
+        _mm_store_si128(idx2, _mm_xor_si128(v2, out));
+        out2 = _mm_xor_si128(out2, out);
+
+        out = _mm_setzero_si128();
+        single_comupte_wrap<0>(n3, n1, n2, n0, 1.3203125f, rc, suma, out);
+        single_comupte_wrap<1>(n3, n2, n0, n1, 1.3515625f, rc, suma, out);
+        single_comupte_wrap<2>(n3, n0, n1, n2, 1.3359375f, rc, sumb, out);
+        single_comupte_wrap<3>(n3, n0, n2, n1, 1.4609375f, rc, sumb, out);
+        sum3 = _mm_add_ps(suma, sumb);
+        _mm_store_si128(idx3, _mm_xor_si128(v3, out));
+        out2 = _mm_xor_si128(out2, out);
+        sum0 = _mm_add_ps(sum0, sum1);
+        sum2 = _mm_add_ps(sum2, sum3);
+        sum0 = _mm_add_ps(sum0, sum2);
+
+        sum0 = _mm_and_ps(_mm_castsi128_ps(_mm_set1_epi32(0x7fffffff)), sum0); // take abs(va) by masking the float sign bit
+        // vs range 0 - 64 
+        n0 = _mm_mul_ps(sum0, _mm_set1_ps(16777216.0f));
+        v0 = _mm_cvttps_epi32(n0);
+        v0 = _mm_xor_si128(v0, out2);
+        v1 = _mm_shuffle_epi32(v0, _MM_SHUFFLE(0, 1, 2, 3));
+        v0 = _mm_xor_si128(v0, v1);
+        v1 = _mm_shuffle_epi32(v0, _MM_SHUFFLE(0, 1, 0, 1));
+        v0 = _mm_xor_si128(v0, v1);
+
+        // vs is now between 0 and 1
+        sum0 = _mm_div_ps(sum0, _mm_set1_ps(64.0f));
+        uint32_t n = _mm_cvtsi128_si32(v0);
+        idx0 = scratchpad_ptr<MASK>(lpad, n, 0);
+        idx1 = scratchpad_ptr<MASK>(lpad, n, 1);
+        idx2 = scratchpad_ptr<MASK>(lpad, n, 2);
+        idx3 = scratchpad_ptr<MASK>(lpad, n, 3);
+    }
+}
+
+template void cn_gpu_inner_ssse3<xmrig::CRYPTONIGHT_GPU_ITER, xmrig::CRYPTONIGHT_GPU_MASK>(const uint8_t* spad, uint8_t* lpad);
diff --git a/src/workers/CpuThread.cpp b/src/workers/CpuThread.cpp
index af55b0dac..d709fc6ef 100644
--- a/src/workers/CpuThread.cpp
+++ b/src/workers/CpuThread.cpp
@@ -250,6 +250,21 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
 
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
 
+#       ifndef XMRIG_NO_CN_GPU
+        cryptonight_single_hash_gpu<CRYPTONIGHT, false, VARIANT_GPU>,
+        nullptr,
+        cryptonight_single_hash_gpu<CRYPTONIGHT, true,  VARIANT_GPU>,
+        nullptr,
+        nullptr,
+        nullptr,
+        nullptr,
+        nullptr,
+        nullptr,
+        nullptr,
+#       else
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
+#       endif
+
 #       ifndef XMRIG_NO_AEON
         cryptonight_single_hash<CRYPTONIGHT_LITE, false, VARIANT_0>,
         cryptonight_double_hash<CRYPTONIGHT_LITE, false, VARIANT_0>,
@@ -282,6 +297,7 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_2
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_HALF
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       else
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_0
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_1
@@ -294,6 +310,7 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_2
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_HALF
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       endif
 
 #       ifndef XMRIG_NO_SUMO
@@ -340,6 +357,7 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_2
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_HALF
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       else
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_0
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_1
@@ -352,6 +370,7 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_2
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_HALF
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       endif
 #       ifndef XMRIG_NO_CN_PICO
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_0
@@ -375,6 +394,8 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         cryptonight_triple_hash<CRYPTONIGHT_PICO, true,  VARIANT_TRTL>,
         cryptonight_quad_hash<CRYPTONIGHT_PICO,   true,  VARIANT_TRTL>,
         cryptonight_penta_hash<CRYPTONIGHT_PICO,  true,  VARIANT_TRTL>,
+
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       else
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_0
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_1
@@ -387,6 +408,7 @@ xmrig::CpuThread::cn_hash_fun xmrig::CpuThread::fn(Algo algorithm, AlgoVariant a
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_2
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_HALF
         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_TRTL
+        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, // VARIANT_GPU
 #       endif
 #       ifndef XMRIG_NO_ASM
         cryptonight_single_hash_asm<CRYPTONIGHT, VARIANT_2, ASM_INTEL>,
diff --git a/src/workers/MultiWorker.cpp b/src/workers/MultiWorker.cpp
index eff330624..a25665df6 100644
--- a/src/workers/MultiWorker.cpp
+++ b/src/workers/MultiWorker.cpp
@@ -54,13 +54,16 @@ bool MultiWorker<N>::selfTest()
     using namespace xmrig;
 
     if (m_thread->algorithm() == CRYPTONIGHT) {
-        return verify(VARIANT_0,    test_output_v0)  &&
-               verify(VARIANT_1,    test_output_v1)  &&
-               verify(VARIANT_2,    test_output_v2)  &&
-               verify(VARIANT_XTL,  test_output_xtl) &&
-               verify(VARIANT_MSR,  test_output_msr) &&
-               verify(VARIANT_XAO,  test_output_xao) &&
-               verify(VARIANT_RTO,  test_output_rto) &&
+        return verify(VARIANT_0,    test_output_v0)   &&
+               verify(VARIANT_1,    test_output_v1)   &&
+               verify(VARIANT_2,    test_output_v2)   &&
+               verify(VARIANT_XTL,  test_output_xtl)  &&
+               verify(VARIANT_MSR,  test_output_msr)  &&
+               verify(VARIANT_XAO,  test_output_xao)  &&
+               verify(VARIANT_RTO,  test_output_rto)  &&
+#              ifndef XMRIG_NO_CN_GPU
+               verify(VARIANT_GPU,  test_output_gpu)  &&
+#              endif
                verify(VARIANT_HALF, test_output_half);
     }