diff --git a/src/backend/cpu/CpuWorker.cpp b/src/backend/cpu/CpuWorker.cpp
index 3ff312254..1b92faa48 100644
--- a/src/backend/cpu/CpuWorker.cpp
+++ b/src/backend/cpu/CpuWorker.cpp
@@ -82,7 +82,8 @@ xmrig::CpuWorker<N>::CpuWorker(size_t id, const CpuLaunchData &data) :
 {
 #   ifdef XMRIG_ALGO_CN_HEAVY
     // cn-heavy optimization for Zen3 CPUs
-    if ((N == 1) && (m_av == CnHash::AV_SINGLE) && (m_algorithm.family() == Algorithm::CN_HEAVY) && (m_assembly != Assembly::NONE) && (Cpu::info()->arch() == ICpuInfo::ARCH_ZEN3)) {
+    const bool is_vermeer = (Cpu::info()->arch() == ICpuInfo::ARCH_ZEN3) && (Cpu::info()->model() == 0x21);
+    if ((N == 1) && (m_av == CnHash::AV_SINGLE) && (m_algorithm.family() == Algorithm::CN_HEAVY) && (m_assembly != Assembly::NONE) && is_vermeer) {
         std::lock_guard<std::mutex> lock(cn_heavyZen3MemoryMutex);
         if (!cn_heavyZen3Memory) {
             // Round up number of threads to the multiple of 8
diff --git a/src/backend/cpu/interfaces/ICpuInfo.h b/src/backend/cpu/interfaces/ICpuInfo.h
index 7a8887239..54e6aabfe 100644
--- a/src/backend/cpu/interfaces/ICpuInfo.h
+++ b/src/backend/cpu/interfaces/ICpuInfo.h
@@ -111,6 +111,7 @@ public:
     virtual size_t packages() const                                                 = 0;
     virtual size_t threads() const                                                  = 0;
     virtual Vendor vendor() const                                                   = 0;
+    virtual uint32_t model() const                                                  = 0;
 };
 
 
diff --git a/src/backend/cpu/platform/BasicCpuInfo.h b/src/backend/cpu/platform/BasicCpuInfo.h
index 88760bac8..574b8c9d6 100644
--- a/src/backend/cpu/platform/BasicCpuInfo.h
+++ b/src/backend/cpu/platform/BasicCpuInfo.h
@@ -62,6 +62,14 @@ protected:
     inline size_t packages() const override                     { return 1; }
     inline size_t threads() const override                      { return m_threads; }
     inline Vendor vendor() const override                       { return m_vendor; }
+    inline uint32_t model() const override
+    {
+#   ifndef XMRIG_ARM
+        return m_model;
+#   else
+        return 0;
+#   endif
+    }
 
 protected:
     Arch m_arch             = ARCH_UNKNOWN;