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AMD® Phenom™ II Overclocking Thread

ah well in my experience they will error within 5 minutes or so when prime would go on at the same settings for several hours. Everyone has their own preferences though
 
Prime95 has always been my stability tool :)
Blend you say? - wouldn't that be best for testing everything overall, but a Small FFT test better for stressing the CPU?. Anyways better not get into that debate here -bet you guys have heard it a million times already :)
 
zoomee, no "best" anything, but 8 hours Prime95 "Blend" is very respectable on AM2+/AM3 and is the only test that has ever given me problems on this platform, YMMV! :)
 
Does anyone have any idea why my cpu voltage is dropping down to 1.0v when stressing?

I have disabled cool n quiet in the bios, loadline calibration is set to 16%.

I am running my 965 at 3.8 with 2600ht and 2600cpu-nb at 1.45v.

It is stable but when it reaches around 54 degrees the voltage plummets and performance decreases, I've got a scythe mugen 2 and cooling in my case is very good, I find it hard to thin 54 is too hot? Any help much appreciated.
 
It doesn't happen at stock, however it doesn't reach 54/55 degress at stock. It only seems to drop to 1.0v when it reaches this temperature - as if there is some kind of safety setting engaging - I've scoured my bios and there is nothing such as this which appears to be enabled. Cool n quiet and smart q-fan is disabled.

My specs are:

Hiper Type R 480w
Asus 770TD Pro mobo
Phenom ii 965 - Scythe Mugen 2
4gb RAM 1600mhz ripjaws
ATI Sapphire 4850 512mb
2 x IDE drives
1 x DVD drive
2 x 120mm case fans

Could my problem be the power supply not providing enough juice? If the psu was overloaded I assume I'd just be faced with a reboot, not a cpu voltage drop?

Anyone else had the same problem?
 
Hi joewm18,

that is total weirdness? :confused: . . . my search skills are failing me also and I can't find the product page for an ASUS 770TD-Pro :o
 
Yeah, it's quite frustrating! Thanks for looking though :)

The mobo this 1 http://uk.asus.com/product.aspx?P_ID=0AvsBb7WBZe2i9zK&templete=2

I'm trying to find an overclock at the moment with a low enough voltage to keep it under 54/55 degrees.

Currently running 18.5x205 = 3800mhz with 1640mhz ram and 2460mhz HT and CPUNB. Vcore is 1.425v and cpunb voltage is 1.3v. It seems nice and stable, but it is still hitting that limit and dropping the voltage down.

I will run intel burn test, and it may not be until the 5th run onwards that the drop occurs because it takes this long to get the cpu up to temperature.
 
I've just been watching CPUz whilst running IBT, when this temp is reached and the volts drop to 1v the MHz drops to 800Mhz with a 4 multiplier!

:/
 
Joewm18: I would check to make sure you don't have any CPU temperature protection turned on in the BIOS or something.. if it is always at a specific temperature suggests that something is cutting CPU vcore and frequency to reduce heat and protect the CPU.

If you don't then may well be the CPU it's self... perhaps a mis-reporting sensor is reporting a lower than actual temperature and it is hitting a thermal protection limit.. or maybe the CPU is faulty..

it may be worth downloading K-10 stat and see what that reckons is going on.. you might be able to use that to force a P-State and stop the drop
 
Joewm18: I have the same thing, its thernal protection and i think its hard set in the chip and no setting can turn it off. I think your sensor temp reported is off and when its hitting 55 on the temp program its actually hitting the thermal limit of the chip and thus down clocking itself to protect it and lower the heat.
 
Hi everyone i am trying to overclock my PII 955 BE for the first time. I have my new 5850 so i think im gonna need to bump up the juice. I have done a lot it of reading but im kinda confused, from what i understand as i have the BE all i have to do is up the multiplyer. This sounds kinda straight forward but i do not understand when it
comes to changing the voltage for the cpu and the nb etc and how to overclock the ram to.

I would be so grateful for and advice i really want to learn how to do this

Thanks so much

Liam
 
Joewm18. SiSoftware Sandra Lite 2010c says the cpu Hardware Thermal Control throttle is at 79c, so it can't be throttling by the cpu Hardware Thermal Control, or u may have a faulty chip..
 
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