letsgetiton

I was able to unlock my 4th core in the BIOS ACC section. In that section there's a setting for Values. -12 to +12 mine by default was set at -2.
What are the Values of and what should it be set to?

__________________
Take No Prisoners Gentlemen

ITaoI

+1 what do the values mean?

__________________
CPU-Z AMD Phenom x4 9950BE

CPU-Z AMD Phenom II x3 550BE /B50
CPU-Z AMD Phenom II x2 550BE

letsgetiton

No one seems to know. They say AMD never published anything about ACC Values? Everyones guessing it's for OCing and are saying to increase to +XX for OCing. Not me, I'll leave it alone for now. Yours is set to +1 by default? How many cores did you unlock, 3 or all 4? I got the 4th core unlocked easily. I would be careful OCing these locked cores because there's a reason they were locked, weak, faulty so...

__________________
Take No Prisoners Gentlemen

Dopamin3

-2% is the default. I wouldn't really mess with them. They supposedly allow higher overclocks on lower voltage if you fine tune them, but probably not on Phenom II.

__________________

mduclow

I've been asking about this myself, without any solid answer, too.

I believe that the values allow you to tune weak cores when overclocking so that you don't just have to increase volts to accommodate a failed o/c. Does that make sense?

Hypothetically speaking: If you were to determine that your second and third cores were the ones that were failing first on your overclock, then you could go into the ACC and individually adjust the cores to acommodate the weak cores. You might find that increasing the ACC for the number two and number three cores by +1/+2 allows the previously failed o/c to now run without increasing your volts.

I also believe that once this is set, adjusting all cores up 'some' might also 'loosen' the ability to clock higher in the chip.

I don't know any of this for a fact, but it is what I have surmised from my searches to try and learn about this unknown feature.

It seems to make sense to me, and most companies do not officially support overclocking with their products, and certainly not to the extent that the ACC would be of true benefit. So, I'm not really surprised that it is kinda 'hush-hush'.

Marc

EDIT: I should have mentioned as well that I also believe the lower ACC values (-2, -4, etc...) are also supposed to allow lower voltages with a given clock. It seems they work against each other, meaning if you want to clock high use it to stabilize by increasing, if you want to stay 'stock'~ and lower temps/volts use it by lowering values to -2 or -4 etc... -- Again, I do not know this for a fact, but it seems to be the situation with ACC.

We definitely need more info on this feature.

__________________

The Official MSI 790FX-GD70 Owners Thread

3dmarkVantage - 12884