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i7 3820 - 4820 Overclock Club - Page 136

post #1351 of 6491
Quote:
Originally Posted by Sporadic E View Post

Relax amigo. Not all chips are created equal. My 3820 is a booger to get to anything over 4.6 without pushing the voltage over 1.4 as well. It is what it is, that is a 1GHz OC afterall. Make peace with it.
Look at these BIOS settings and see if they help you any. It is for a 3930k but 3820s use the same settings.
http://www.overclock.net/t/1151946/official-asus-rog-rampage-iv-x79-owners-club/1190#post_17351751 post #1200

Es

Yeah I knew that chips can vary, but I wasn't sure whether mine was within the normal range of variance, or whether I had gotten something intrinsically wrong with the overclock as this will be my first time trying.

Cheers for the help and link, +rep.
post #1352 of 6491
Quote:
Originally Posted by Paradigm84 View Post

I'm getting the feeling that I have done something seriously wrong with my overclock, could 1.4vcore for 4.625GHz really be right? I know there is variance between different chips but the difference between my overclock and others is more than I would expect.

Mine needs 1.4V (1.395 BIOS, 1.40x reported by CPU-Z) for that speed too. You are not lucky, but not unlucky either. If you can hold your temps down that is...mine folds happily @ 70oC stable on air, so I don't complain thumb.gif
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post #1353 of 6491
Quote:
Originally Posted by dtolios View Post

Mine needs 1.4V (1.395 BIOS, 1.40x reported by CPU-Z) for that speed too. You are not lucky, but not unlucky either. If you can hold your temps down that is...mine folds happily @ 70oC stable on air, so I don't complain thumb.gif

Mine is folding at around the same butI think my vcore in the BIOS is actually 1.39 not 1.4.

I hope when I get a 3930K it's a golden chip. biggrin.gif
post #1354 of 6491
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2519103.png i GOT THIS LAST NITE 6HRS P95 STABLE ON WATER MORE TWEEKS TO COME I REKON smile.gif
post #1355 of 6491
Quote:
Originally Posted by HOMECINEMA-PC View Post

2519103.png i GOT THIS LAST NITE 6HRS P95 STABLE ON WATER MORE TWEEKS TO COME I REKON smile.gif

Solid. I've tried pumping it a bit more, but under my SA SB-E, the CPU starts building up heat pretty fast once i feed it with more than 1.4V. I cannot do even 4.75 stable with my part without breaking 83 or more Cs.
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post #1356 of 6491
Quote:
Originally Posted by HOMECINEMA-PC View Post

2519103.png i GOT THIS LAST NITE 6HRS P95 STABLE ON WATER MORE TWEEKS TO COME I REKON smile.gif

Cool, so the bclk CAN be adjusted?
post #1357 of 6491
Thread Starter 
Sounds about right for these buggars this malay chips controller is really good were the costa rica chip will o/c less on much less volts
post #1358 of 6491
Thread Starter 
sure can! 130x38 @ 2040 ram 1.435v bios every chip acts differently remember that:thumb:
post #1359 of 6491
Quote:
Originally Posted by Derpinheimer View Post

Cool, so the bclk CAN be adjusted?

Yes, but needs to stay within 5% or so of strap.

One of the RIVE standard BIOS settings is 100 strap, 106 BCLK and 44 multi, if I recall correctly.

My 4.8 is 125 strap, 130 BCLK, 37 multi.
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post #1360 of 6491
Quote:
Originally Posted by Derpinheimer View Post

Cool, so the bclk CAN be adjusted?
Yes, you can. How much you can adjusted depend on the quality of the CPU. Worst case scenario, if the clock is too high & the CPU unable to maintain it, your computer will crashed/BSOD. Most CPUs only can handle 5% to 10% range of adjustment. AFAIK, CPU has 4 straps, 100, 125, 167, 250 (ratio 1:1, 1:1.25, 1:1.67, 1:2.5 respectively). E.g. when you set BCLK to 127 & CPU strap to 125:-
  • CPU Strap 125 ==> 1.25
  • BCLK / Strap = 127 / 1.25 = 101.6

which means 127MHz is given to CPU & 101.6MHz to PCIe/SATA/DMI controller.
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