I have just upgraded from AMD Threadripper 2950x to 2990wx and from a 16-core CPU to a 32-core one. I used to mine Monero using 2950x (cpuThreads = 13) and achieved a hashrate of about 6 kH/s. Now I mine Monero using 2990wx (cpuThreads = 26) and by default, gain a hashrate of about 2 kH/s only, which is a performance reduction by around two-thirds. I have tried various configurations of Ryzen Master such as Dynamic Local Mode and also CorePrio, but to no avail.

But by running nanomier and SRBMiner together in the Windows 10 environment, 2990ws has been able to get more than 5 kH/s, still a little slower than 2950x. I will continue to tweak the two programs in the hope of further hashrate improvement.

Hopefully, nanominer developers could add manual affinity (every other thread) option so that there is no need to run SRBMiner any more and help minimize a drain on system resources.