Haswell-E Single Core Overclocking

AManWithPlan · August 26, 2015

Dear Linus Community,

My question is simple, is it possible to truly micromanage each Core's clock speed on my 5930K processor using an ASUS X99-Pro/USB3.1 motherboard?

When I go into BIOS and select "Per Core" overclocking, I am able to edit the multiplier on "1-Core Ratio Limit", "2-Core Ratio Limit", etc up to my 6 cores. However, this does not overclock specific cores, this overclocks a random core when the processor decides (based on load) to only use 1 core (2 cores, etc) in its operation.

If I select a multiplier of 45 for "1-Core Ratio Limit", and 40 for all other ratio limits, then my processor will occasionally spike to 4.5Ghz when only a single core is active (hardly ever) then clock back down to 4.0Ghz when any other core is turned on beyond the first one.

If I select a multiplier of 45 for "1-Core Ratio Limit" , 45 for "2-Core Ratio Limit", and 40 for all other ratio limits, then my processor will more often spike to 4.5Ghz when either a single core, or only two cores, are active (very seldom) then clock back down to 4.0Ghz when any other core is turned on beyond the first two.

You see my issue, how can I permanently set the turbo limit on a user-selected Core on my processor to 45 while limiting turbo to 40 on all other cores? Is this even possible? My goal is to set processor affinity of single-threaded applications to this overclocked core.

Amanwithplan