cpuMask Posted March 11, 2014 Share Posted March 11, 2014 Can anyone give me examples of cpu bit masks to use for a 4-core multithreaded cpu? I tried variations such as 1001 for cores 1 and 4, 0xFF00FF00 for cores 1 and 3, etc. None of these work as expected. Do I need a prepend or postpend for binary? The default for hex was 0x. Thanks! Quote Link to comment Share on other sites More sharing options...
Fiery Posted March 11, 2014 Share Posted March 11, 2014 It all depends on the logical processor ordering of your operating system. On Vista and later Windowses ordering goes as: Core #1 / HTT Unit #1 Core #1 / HTT Unit #2 Core #2 / HTT Unit #1 Core #2 / HTT Unit #2 ... etc. So to select Core #1 and Core #4, you would have to use a binary bit mask of 01000001 which is hex 41. Regards, Fiery Quote Link to comment Share on other sites More sharing options...
cpuMask Posted March 11, 2014 Author Share Posted March 11, 2014 Thank you, Fiery, that worked. Initial run of Haswell i7 4770k at 1.15 vcore at 4 GHz produced these temps in AIDA64 stress test: Mask:0x40 core1:36c core2:36c core3:42c core4:49c** Mask:0x10 core1:36c core2: 39c core3:51c** core4:37c Mask:0x08 core1:39c core2:51c** core3:41c core4:33c Mask:0x01 core1:52c** core2:41c core3:42c core4:33c Now I can push core 1 to it's peak and use adaptive with per-core. Thanks! Quote Link to comment Share on other sites More sharing options...
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