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555 unlocked to b55 x4 overclocking - Page 3

post #21 of 27
Try setting ACC to auto...when i did that i got to 4.2ghz no problem in B55 as a dual mine gets up to 4.5ghz
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post #22 of 27
I ended up going from a slightly unstable 4GHz B55 x4 with a voltage of 1.56, to a very stable x3 @ 4.21GHz with 1.525v. It was because my 3rd core was clearly less stable then the rest. Disabling it gave me a lot more headroom and stability.

I also set acc to +12on the 3 cores I used per ~kRon1k~'s suggestion. I don't know if it made a difference or not because I wasn't testing that in particular.
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post #23 of 27
I also used ACC to auto.
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post #24 of 27
Thread Starter 
well so far so good i just finished a 12 hr p95 test and my 4th core threw out somewhere between 10-12 hrs in 32k and im running it at 1.46v at 4107mhz +12 acc on all cores im gona try and bump up the voltage to 1.47 and see how it goes then i will try setting acc to auto and see how it goes however i did manage to pull of a stable 4ghz b55 x4 at 1.440v
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valkyrja
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post #25 of 27
Thread Starter 
Quote:
Originally Posted by draggy View Post
I ended up going from a slightly unstable 4GHz B55 x4 with a voltage of 1.56, to a very stable x3 @ 4.21GHz with 1.525v. It was because my 3rd core was clearly less stable then the rest. Disabling it gave me a lot more headroom and stability.

I also set acc to +12on the 3 cores I used per ~kRon1k~'s suggestion. I don't know if it made a difference or not because I wasn't testing that in particular.
im going to try this ive officially settled for 4065mhz any higher than that and i have to push past 1.51v and im not willing to go past 1.52v just yet seeing as ive only had it a month. im not willing to have it slowly degrade like my 550 did after pushing my 550 to 4.1ghz at 1.56v if i tried to run it at stock it got really boggy and acted sluggish. i will try it as a triple core tonight and see how far i can push it. my 4th core has to be the defective one since its the only one that throws out consistently in the same tests. ive run p95, occt,linx,ibt, amd over drive and aida64 stability test. reading the test logs they all point to core 4 as the culprit.
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valkyrja
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post #26 of 27
I had the same problem, I bet you can do much better by disabling that core. I only had a minuscule drop in performance when running games, and that's what I use my machine for.
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post #27 of 27
Thread Starter 
im going to give it a try this weekend ive been to busy the last few days to actually tackle this
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valkyrja
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mini destroyer
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CoolingCoolingCoolingCooling
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CoolingCoolingCoolingCooling
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Silverstone ps07 x7 xl-790h Corsair MM200 Pioneer VSX-D914 
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intel core i7-3615QM apple mac mini 6,1 logic board intel hd 4000 patriot mac series 
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