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Amd Advanced Clock Calibration guide

post #1 of 16
Thread Starter 
Anyone know of one of these online somewhere?

I see people posting there settings but I have no clue where to even start.

I don't know what + or - anything does to my OC.

How the hell do you use it???

Thanks
Edited by By-Tor - 10/12/08 at 9:49am
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post #2 of 16
Quote:
Originally Posted by By-Tor View Post
Anyone know of one of these online somewhere?

I see people posting there settings but I have no clue where to even start.

I don't know what + or - anything does to my OC.

How the hell do you use it???

Thanks
Im not so sure ive seen any guides about.

I think that raising the threshold of ACC allows higher clock speeds, whereas lowering the threshold allows for higher power efficiency and such, but dont quote me on that.

Ill keep an eye out.
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post #3 of 16
Ok I will help you out to the best of my knowledge. Ok so I was browsing XS. And this is how they explained it.

If you OC and a core fails on prime then add 1% on the core that failed and so on. So if core 2 failed add 1% acc on that core. It might need more if it keeps failing Prime. Somthing like that. And I think "auto" is 1-5% on each core.
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post #4 of 16
Thread Starter 
Well that makes since.. So what is it changing by adding or subtracting? Voltage maybe?

Prime95 lets you know which cores fails? I never noticed that if it does.

Thanks
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post #5 of 16
Yea it will let you know what core fails. And I think you would want to put + on the core that fails like you said.
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post #6 of 16
nobody knows how ACC works. AMD never explained it.

I use p95 in conjuntion with coretemp, you'll notice which core fails when it goes to 0% load
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post #7 of 16
There is no impact on performance, no change of voltages or frequencies, it just allows for more and higher overclocking. Anandtech reports that the new BIOS of coming motherboards with the SB750 southbridge has a much wider range of settings for the Advanced Clock Calibration (ACC). In the past this function could be set in increments of 1 between -2 up to 0. With the board they've used they could set ACC to anything between -12 to +12. Negative values unlocks lower power operations while higher values unlocks better overclocking.

Exactly what it does hasn't been revealed, but it somehow seems to loosen the strains a bit and allow the cores to be pushed further in either direction. It should be emphasized that this is a Phenom-exclusive feature. You will not gain anything with your Athlon series processors. We should also mention that AMD will use this feature with its coming 45nm processors, which means that the prior reports of decent overclocking with the Deneb core, may be understated.

Source: http://www.nordichardware.com/news,7982.html

idk if this helps but i kinda understand it a lil more now..
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post #8 of 16
So, in theory, you'd might as well push all the cores to +12 for highest OC possibilities? When an OC fails on me, its never one core, its always BSOD, lol... I know thats memory related, but my memory is completely stock all the way across...
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post #9 of 16
Quote:
Originally Posted by By-Tor View Post
Anyone know of one of these online somewhere?

I see people posting there settings but I have no clue where to even start.

I don't know what + or - anything does to my OC.

How the hell do you use it???

Thanks
This will NOT help your Phenom II chip (it has ACC integrated).

This is for the first Phenom chips. Do NOT use ACC or it'll make your OC unstable (ironic but true.)

EDIT: mikeyk365 bumped an old thread, and then SwishaMane bumped it again X3.

http://www.tomshardware.com/reviews/...m-ii,2273.html
Edited by dzalias - 10/16/09 at 10:02pm
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post #10 of 16
Quote:
Originally Posted by dzalias View Post
This will NOT help your Phenom II chip (it has ACC integrated).

This is for the first Phenom chips. Do NOT use ACC or it'll make your OC unstable (ironic but true.)

EDIT: mikeyk365 bumped an old thread, and then SwishaMane bumped it again X3.

http://www.tomshardware.com/reviews/...m-ii,2273.html

ACC on auto does not make it unstable. OP wrong part of forum for this thread.
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