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Phenom II steppings and max OC 550-940 - Page 56

post #551 of 2829
Quote:
Originally Posted by pixie View Post
the NB frequency is controlled by the CPU-NB multiplier. also, the CPU-NB is basically the integrated memory controller, not the NB. people say to keep the CPU-NB voltage the same as the CPU voltage and i've found it helps.

in AOD, i believe the NB VID refers to the CPU-NB voltage and the NB Volt refers to the actual NB voltage. i'm not too sure, it could be backwards, you'll have to check it out yoruself.
Throwing rep you way kind sir.
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post #552 of 2829
can add me, can't get 3.7 or 3.8 stable for stress test but gaming is fine
phenom II 940
cacvc ac 08508pcw
rb-c2
3.6 @ 17x212 @1.4v
nb v auto
nb clock 1910
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post #553 of 2829
Quote:
Originally Posted by pun3D View Post
But if you do that all the hot air from the Xig will hit the gpu.
Yeah I know, I was just going to remount it to see if it would make a difference. I just think that if the Ultra Kaze had more air to push I could be in the 20's idle. Whatever though, 31 idle isnt bad.
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post #554 of 2829
Well here are my initial tests this weekend.

-Phenom II 940
-CACVC AC 0848FPMW
-3.848GHZ (208x208)
-1.52 Cpu Volts
-1.30 CPU-NB voltage
-1874.40 Northbridge clock
-1664.30 HTT link 1.30 voltage
-Asus M3A79-T
-0602
-Air: True BE

I ran a bunch of tests:

Surfed Web
Ran Antivirus scan
Idle for roughly 1hr
Everest Stability test for 12 minutes
3MARK06
VANTAGE
Super Pi
Game for 1hr: Left 4 Dead
Prime95 for 10 Minutes




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post #555 of 2829
Hey everybody, thought you guys might be ineterested in this response. I was talking to Simon (his username on OCN is 64NOMIS) from AMD. He gave me a little insight on the safe Voltages for these Phenom II chips.

Quote:
Originally Posted by Slappa View Post
One last question. Could you give any insight on the safe voltages for these chips? I know and understand the architecture is different from the Core 2 and i7 architectures from Intel. Knowing that they are very sensitive to high voltage and can die if not volted carefully, how do AMD chips fare? I understand that these Phenom II's can take more voltage than the Intels, but just how much more? Under a more standard cooling method especially, like say any standard or high quality air setup?
Quote:
Originally Posted by 64NOMIS (Simon from AMD) View Post
Stock voltage is safe.

I have found that over-volting under conventional cooling should be modest at best. Minimizes collateral damage. Keeping voltage increases modest and going for clock seems to be the most effective technique under conventional cooling in particular if you are looking for stable or everyday operation. I am using 1.4v on a compact water system, no problem and stable at 3.5GHz. I wouldn't go above 1.5v on this particular system, only because I wouldn't expect it to buy me much. Under extreme cooling we have been in the 1.8v range but at that point you are frying CPUs at a good clip. In my brief experience with this new 45nm glass, somewhere between 1.5 and 1.8 is the "isn't it exciting to overclock (and risk frying processors)" range.

Now I don't want you guys to mass PM Simon. Treat him like any other member of this forum.
Edited by Slappa - 1/25/09 at 12:28pm
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post #556 of 2829
Quote:
Originally Posted by Slappa View Post
Hey everybody, thought you guys might be ineterested in this response. I was talking to Simon (his username on OCN is 64NOMIS) from AMD. He gave me a little insight on the safe Voltages for these Phenom II chips.






Now I don't want you guys to mass PM Simon. Treat him like any other member of this forum.
that's interesting. but really, i just want the 4.0GHz on water that the AMD slides touted. the most i've been able to achieve is 3.96GHz and that was nowhere near stable.
    
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post #557 of 2829
Quote:
Originally Posted by pixie View Post
that's interesting. but really, i just want the 4.0GHz on water that the AMD slides touted. the most i've been able to achieve is 3.96GHz and that was nowhere near stable.


so do i they promised 4 on air.
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post #558 of 2829
I tried to go 4ghz on air....and to no avail. I spent 6 hours today trying.

the only "stable" clock that I can muster out of this chip is 3.91ghz anything more and Ill be pushing 1.6volts and its still not "stable".
im satisfied at 3.91 if I did go to 4ghz its will be unfreakingbelievable , but I think the only way I can go pass 4ghz is to use better cooling.
    
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post #559 of 2829
Can you guys not get 4.00 with multipliers? I can bench with super pi at 4.00 but its not stable. locks up everytime i try to run 3dmark06.
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post #560 of 2829
I think it will be possible once mb manufacturers come out with bios designed for the 940 and not to mention this supposed AMD OverDrive 3.0 what is specific for the Phenom II.
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