Nicehash does not detect 2nd cpu

[denjcodes]

I have a two cpu x5675 and only one is detected by NHML.

When I check the CPU utilization, 6 cores are at 100% utilization, while 6 cores are at 50% utilization.

The picture attached shows my rig setup: X5675 x 2, RX840 and HD 7800 (both AMD)

[DillonN]

NHML doesn't have full support for dual CPUs, but the underlying miners will. Xmrig should automatically run the most optimal setting, but I haven't checked xmr-stak. Note that optimal performance for cryptonight is usually NOT 100% CPU utilization, since it is more dependent on cache

[denjcodes]

Is there any way I can improve utilization by running multiple instances of NHML?

[DillonN]

I don't believe a second instance will help, you can customize the affinity through extra launch parameters though to force which cores are mining. See some discussion on #593 related to this, or you can google it for Xmrig specifically. If you do still want to use a second NHML instance, this affinity setting can let you bind an instance to one CPU

[denjcodes]

It seems that I couldn't improve on the optimal settings by setting --cpu-affinity 0xFFF --av=0 . I assumed I was doing something wrong because I saw someone else with the same cpu(s) as mine but having two cores show up. #427