BobbyRay Posted October 9, 2011 Share Posted October 9, 2011 Hello all, I first noticed this in iStat, and SMC Monitor seems to agree. My i5-2500k has a vcore of 1.2V when I check my BIOS. Once I've booted into OS X, iStat and SMC Monitor both report a core voltage of 1.38 - 1.4V. Any clue what is going on? I added GeneratePStates=Yes and GenerateCstates=Yes to my boot.plist. SMC Monitor seems to indicate those are being generated. Is it possible that these values are incorrect, and that my vcore is actually at 1.2V? Any help would be greatly appreciated. Thanks Link to comment Share on other sites More sharing options...
Noam AA Posted October 9, 2011 Share Posted October 9, 2011 at some mysterious point, i started to get higher Vcore reports too even when i set the Vcore to not cross the 1.25 on BIOS, it report in OSX the highest Vcore is 1.275 i really can't tell what causing this, cause one day i had everything great, Vcore was up to 1.21, now it's 1.275 OC but now it present a voltage change i don't like so much and i don't know if it even read it right, cause at some pint, it started happening to a friend's hackintosh also (strange voltage readings, changing faster then usual..) i tried various chameleon revs, and also some other things like rebuilding catches, injecting stat in all kind off ways (DSDT, Chameleon, and Pstat Changer) all generating same stats. i also like to notice, that once, when i had the correct Vcore readings (or so i think it was), it was installed in Extra folder, and when i tried to move the Extra folder to S/L/E, to use the new "usekernelcaches" i started getting weird core readings, but when moved it back to Extra everything back to normal.. just now it's permeant (no matter Extra or S/L/E . as i said, "at some mysterious point") Link to comment Share on other sites More sharing options...
BobbyRay Posted October 9, 2011 Author Share Posted October 9, 2011 Thanks for the response. I am using Kernel Cache, but I was noticing this issue even before enabling that. Link to comment Share on other sites More sharing options...
BobbyRay Posted October 10, 2011 Author Share Posted October 10, 2011 After running MSRDumper I am seeing some strange behavior. My system multiplier is oscillating between 16x and 33x, but never hitting the states in between. I am wondering if this could somehow be related? Link to comment Share on other sites More sharing options...
LatinMcG Posted October 10, 2011 Share Posted October 10, 2011 try lessVolt=10 to undervolt it ( makes my core2duo laptop run 40c instead of 48c) the issue for u might be the turbo function Link to comment Share on other sites More sharing options...
BobbyRay Posted October 10, 2011 Author Share Posted October 10, 2011 try lessVolt=10 to undervolt it ( makes my core2duo laptop run 40c instead of 48c) the issue for u might be the turbo function lessVolt didn't make any difference in the iStat reading. I also tried disabling the Turbo function in BIOS, but to no avail. The good news is that I pulled out my multimeter and found Vcore on the back of the motherboard. It reads ~1.05V at idle and ~1.25 at load, so it appears that FakeSMC is just reporting incorrect values. Link to comment Share on other sites More sharing options...
TH3L4UGH1NGM4N Posted October 10, 2011 Share Posted October 10, 2011 Funny thing is that I had to dust off my multimeter recently when I installed iStats on Lion and it was showing my vcore as 0.96v constantly but when measured showed the correct 1.2v from my meter. So I just take it as fakeSMC incorrectly showing the vcore but I had to make sure that os x wasn't under volting my cpu for some odd reason. Link to comment Share on other sites More sharing options...
Noam AA Posted October 13, 2011 Share Posted October 13, 2011 seems like when i boot with -f i have the V.core reports I'm used to get... (not the strange reading and voltage changing) Link to comment Share on other sites More sharing options...
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