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Disabling cores?

post #1 of 59
Thread Starter 
Quick question, If I disable 2 of the cores on my 1055t, will it reduce power draw for the cpu over all? I don't need all 6 cores of my cpu for the time being, and just wanted have 4 to overclock as high as I can, so I was thinking that I could get higher clocks if I disable 2 cores because it might drop power usage and temperatures. I also thought, if the power draw was less, it would put less stress on my motherboard vregs.
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post #2 of 59
Good question. I wonder this too
    
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post #3 of 59
You will consume less power and have lower temps as well, so yes.

I did the same thing on my 1090t. Got it to 4.5Ghz with two cores disabled at 1.39v. I would recommend testing which of your cores are the strongest first though.
    
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post #4 of 59
Quote:
so I was thinking that I could get higher clocks if I disable 2 cores because it might drop power usage and temperatures. I also thought, if the power draw was less, it would put less stress on my motherboard vregs

Yes, yes and yes.

Just lock 2 of your worst cores, the ones that fail stress tests first. You'll get much lower temps, power consumption, etc.

Currently I'm running my 1055T as a quad core, I can run it like 200mhz higher as a quad core, and temps are still 10C-15C lower.
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post #5 of 59
Thread Starter 
Wow, that's awesome, thanks for the quick responses. Now how do I test the bad cores? overclock it till its unstable, run prime 95 and disable the first cores to fail?
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post #6 of 59
Quote:
Originally Posted by lostmage;15574330 
Wow, that's awesome, thanks for the quick responses. Now how do I test the bad cores? overclock it till its unstable, run prime 95 and disable the first cores to fail?

Usually, or use OCCT alternatively, it gives a fail that doesn't crash easier. For Prime95 you have to be borderline stable for it to not BSOD.
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post #7 of 59
Quote:
Originally Posted by Devilmaypoop;15574311 
Yes, yes and yes.

Just lock 2 of your worst cores, the ones that fail stress tests first. You'll get much lower temps, power consumption, etc.

Currently I'm running my 1055T as a quad core, I can run it like 200mhz higher as a quad core, and temps are still 10C-15C lower.

applaud.gif yes..run prime and disable the workers that fail(if any do) or..the last 2..i have a bad core on my current chip frown.gif if i disable it..runs cooler..windows boots faster..and i can clock higher thumb.gif (i'm having temp issues atm anyway frown.gif )
 
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post #8 of 59
It will both consume less and also produce less head, thus allowing you to overclock a little further.

On my i5-750, for example, I've got a profile that disables 2 cores and I can get an extra 200mhz out of it and this profile is specially for when I'm playing crysis, which only uses, as most games out there, 2 CPU cores.


Do it, all the way, specially if you can easily switch between profiles on your motherboard setup.

Also, once I've disabled 3 cores but one to overclock the hell out of it under air and bench with the single threaded super pi tongue.gif


by the way, the part that heats the most in a core, if I'm not mistaken, is the cache. So, if you have two cores that shares a same cache memory, you should disable those, to completely disable their cache and get even lower temps ( I don't really know how your processor's architecture is, so maybe it's better to just disable the cores that fail first at prime 95, for example. I don't know if you noticed, but sometimes one of your cores can fail within 2 hours of testing and the others can go 20... that really pisses an overclocker. I wish we could set different voltages for each core. It sucks to increase the voltage for all cores when only one is failing.)
Edited by EduFurtado - 11/4/11 at 4:04pm
post #9 of 59
Thread Starter 
Yea, my mobo supports like 10 different profiles I think. A lot of what I do is made for dual cores, but it runs those dual cores to 100%, so it would be nice to get an extra boost on a few cores to run those things faster. The highest cpu usage I've gotten so far is about 60%, and that was with assassin's creed on max and minecraft running =P
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post #10 of 59
They say locking #number 2 and 3 core gives best temp results.
    
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