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Discussion Starter #1
I know that enabling ACC on certain mobo can unclock the 4th core,but what will it do when we enable it on phenom II x4 processors?any ideas?
 

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I've read it allows higher clock speeds at lower volts, and i enabled it on my board, it allowed me to go from 3.0 GHz stable to 3.2GHz stable on the same voltage.

Apart from that, i don't think AMD have released much info about it.
 

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Quote:

Originally Posted by I_dalder_I View Post
Well its ment to enable the dormant two cores on the duel core versions of the chip. So heck i dunno enable it and see what it does to a natural quad.
I don't think that was what it was "intended" for. It's just something that it does. I believe it has another purpose.
 

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thanks for the replies guys...well,i had it on auto while oc'ing,cant reach 3.795Ghz stable...but now with it off,i can do prime95 stable...im gonna try +2%(i get no boot with 4% on all cores)...acc is a secret of AMD
 

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amd haven't told us everything about the acc yet but it main purpose was to help stabilize cores, it allows you to individually control the voltages to individual cores hence when you go under the acc option in your bios and set it to manual you will see core0 - +/-2, core1- +/-2, etc so say you ran occt and it says error on core 3 potentially you could go into occt and put +2/4/6(and so on) on that core and hopefully stabilize the one core.
this is also the reason why it unlocks some peoples dual or tri cores since your putting it on auto its putting the extra voltage too it to make it functional


hopefully you all understand it a bit better now threw my gibberish.
 

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Quote:

Originally Posted by mr. biggums View Post
amd haven't told us everything about the acc yet but it main purpose was to help stabilize cores, it allows you to individually control the voltages to individual cores hence when you go under the acc option in your bios and set it to manual you will see core0 - +/-2, core1- +/-2, etc so say you ran occt and it says error on core 3 potentially you could go into occt and put +2/4/6(and so on) on that core and hopefully stabilize the one core.
this is also the reason why it unlocks some peoples dual or tri cores since your putting it on auto its putting the extra voltage too it to make it functional


hopefully you all understand it a bit better now threw my gibberish.
that was what i have read.but when doing prime95 i do sometimes get error on certain cores.but it's not always the same core...
by the way,on my mobo, the option ranges from -12 to +12.
 

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Quote:

Originally Posted by kh90123 View Post
that was what i have read.but when doing prime95 i do sometimes get error on certain cores.but it's not always the same core...
by the way,on my mobo, the option ranges from -12 to +12.
if your getting errors on random cores that would indicate you should be upping the actually cpu voltage for all the cores but as you just said it does allow for negative as well so say you had one good core that never failed in multiple prime runs you could potentially increase the voltage for all the cores but turn down the one good core so it doesn't take as much stress. like i said acc is actually quite handy but as demonstrated so far in this thread most people see it as being an unlocker of cores.
 

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Discussion Starter #12
oh...i get your point.so far,my core0 and my core3 never failed in any of the prime test yet.thanks for the info.but i will try putting 2% and 4% instead of auto to try out higher oc,i wanna see if it really helps with getting higher oc to be stable.
 

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Quote:


Originally Posted by kh90123
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I know that enabling ACC on certain mobo can unclock the 4th core,but what will it do when we enable it on phenom II x4 processors?any ideas?

It can unlock the cache to the full 6mb on the Phenom II x4 8xx series.
 

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