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Phenom II steppings and max OC 550-940 - Page 46

post #451 of 2829
Quote:
Originally Posted by oneluvballer21 View Post
Huh... well what have others been needing to use for CPU voltage when OCing by multi versus reference clock to the same CPU clock? I thought we had a trend going there, but maybe not. So what are you guys experiencing??
For me it took about the same voltage either wasy, maybe a pinch less (0.0125) when using the reference clock.

I still needing better cooling before I try to get any higher than 3528MHz Right now, I'm at 3.5GHz with NB at 2.6GHz and HT at 2.4GHz (going to try to get HT to 2.6GHz also).

Also, for some off reason, something I have never been able to do with my 9850 and 940 (at first) was run 8GB of memory at rated settings of 5-5-5-15, 1066MHz, at 2.1V. Now it seems to be running flawless, don't really know what I did to make it work
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post #452 of 2829
so the avarage OC seems to be 3.7.
is there any reason why?
All these oc's are done on 790fx boards.
and we cant am2+ cpu's on am3, right? or is it the other way arround.

Quote:
for future buyers, please understand that all the work so far has been done mostly with "standard" motherboard BIOS's... the manufacturers should optimize their respective BIOS's for the Phenom II given some time. Likewise, the OS's we're working with are in the same boat, and its possible that there could be a future patch that would help stabilize higher OC's or return better benchmark results (remember AMD dual-core optimizer...?).
Could someone explain to me what "standard" bios means?
Afaik they DID update the bios on new boards to support am2 cpu's, doesn't that mean it works and thats all there is to it?
Edited by Alwinp - 1/23/09 at 8:36am
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post #453 of 2829
I think I'm having issues with cpu power circuitry. Seems like further incrases in vcore past 1.65v leads to a lot of instability, even for clocks that are stable at much lower voltage. I may make an upgrade to a future board that provides a lot of muscle in this area. I'll be looking around as I have an LN2 pot and a trigger finger that wants to hit 1.9v vcore =o).
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post #454 of 2829
Thread Starter 
Finally, after hours of testing!
OCCT stable:


CPU: Phenom II 940BE
CPU stepping: CACVC AC 0851 APMW
Revision: n/a yet
Max CPU clock speed: 3795MHz
Reference clock: 230
Multiplier: 16.5
CPU voltage: 1.52V
CPU-NB voltage: 1.3V
Northbridge clock +voltage: 2530MHz 1.20V (auto)
HTT link speed and voltage: 2530MHz 1.2V (auto)
Motherboard: ASUS M3A79T-Deluxe
BIOS: 6002
Type of cooling: Coolermaster Hyper Z600

It hits 54C and And 1.55V under load.
It seems to be the PH2 likes high ht and NB speeds

Edit: cpu-z validation
http://valid.canardpc.com/show_oc.php?id=491197
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post #455 of 2829
Quote:
Originally Posted by NCspecV81 View Post
I think I'm having issues with cpu power circuitry. Seems like further incrases in vcore past 1.65v leads to a lot of instability, even for clocks that are stable at much lower voltage. I may make an upgrade to a future board that provides a lot of muscle in this area. I'll be looking around as I have an LN2 pot and a trigger finger that wants to hit 1.9v vcore =o).
That may not be your board. Even at 3.6 GHz, which was perfectly stable around 1.48V, it would BSOD after a few minutes in prime when I set the voltage to 1.66V
    
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post #456 of 2829
Quote:
Originally Posted by pow3rtr1p View Post
That may not be your board. Even at 3.6 GHz, which was perfectly stable around 1.48V, it would BSOD after a few minutes in prime when I set the voltage to 1.66V
That is a perfect example of componentry being unable to provide stable volts or being over-capcitated. I'm still around -50c on the evap @ that voltage with cool ambients and there shold not be any temp issues at low clocks. The board becomes entirely unstable around 1.65v regardless of speed. In fact, generally the most common BSOD that you may encounter if your CPU does not have enough volts is the 0x00000124, but these are randomly different for me. You have to remember this is a new realm of overclocking for amd processors and past standards on cpu power circuitry may not be ample for higher voltages and clocks on the phenom II's.
Edited by NCspecV81 - 1/23/09 at 1:25pm
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post #457 of 2829
Quote:
Originally Posted by NCspecV81 View Post
That is a perfect example of componentry being unable to provide stable volts. I'm still around -50c on the evap @ that voltage with cool ambients and there shold not be any temp issues at low clocks. The board becomes entirely unstable around 1.65v regardless of speed. In fact, generally the most common BSOD that you may encounter if your CPU does not have enough volts is the 0x00000124, but these are randomly different for me. You have to remember this is a new realm of overclocking for amd processors and recent standards on cpu power circuitry may not be ample for higher voltages and clocks.
Your best bet is probably an asus M3A79t or an M4A79.

My DFI (well, before it died) started to crap out at 1.6 V.
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post #458 of 2829
Is it still important to keep the HT at or under 2ghz still? I just tested 250x15 vs 200x18.5 with 3dmarks06. the 250x15 got 200398 the 200x18.5 got 20102.
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post #459 of 2829
Quote:
Originally Posted by pun3D View Post
Is it still important to keep the HT at or under 2ghz still? I just tested 250x15 vs 200x18.5 with 3dmarks06. the 250x15 got 200398 the 200x18.5 got 20102.
I've noticed that the closer you can keep the HT to 1800mhz the faster it actually is, in conjunction with a high NB frequency.
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post #460 of 2829
Thread Starter 
Well, I raised mine to 2500 (upped by mp) seems to be a bit more stable in my case.
I couldn't pass 3800 atany cost, but after trial and error, I finally got at at 3800MHz stable.
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