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 # v5.1.0
+- [#1351](https://github.com/xmrig/xmrig/pull/1351) RandomX optimizations and fixes.
+  - Improved RandomX performance (up to +6-7% on Intel CPUs, +2-3% on Ryzen CPUs)
+  - Added workaround for Intel JCC erratum bug see https://www.phoronix.com/scan.php?page=article&item=intel-jcc-microcode&num=1 for details.
+  - Note! Always disable "Hardware prefetcher" and "Adjacent cacheline prefetch" in BIOS for Intel CPUs to get the optimal RandomX performance.
 - [#1307](https://github.com/xmrig/xmrig/issues/1307) Fixed mining resume after donation round for pools with `self-select` feature.
 - [#1318](https://github.com/xmrig/xmrig/issues/1318#issuecomment-559676080) Added option `"mode"` (or `--randomx-mode`) for RandomX.
   - Added memory information on miner startup.