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How to check CPU stability?

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swaresnis   03-07-2008 at 09:03:49 AM

Yesterday I overclocked my Pentium 4 531 from 3ghz to 3.91ghz

http://img341.imageshack.us/img341/49/72895742pi2.jpg

i checked the temperature before overclocking, it was ~45 C and after overclock it was the same, tried to run Crysis and STALKER, and while playing i checked temperature, max was ~51 C.

I ran copies of some "Stress Prime 2004" and with it it took max ~62 C on CPU....

and it seems everything work stable, with my *****y graphics card 7300LE on lowest graphics FPS after overclock was increased from 15 to 27-30.

Overal it seems everything is working very stable, but my ask is what kind of software you recommend to check is my CPU really stable at 3.91 GHz ? :)

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Maziar   03-07-2008 at 10:05:17 AM
- 0 +

ORTHOS
PRIME 95
OCCT
SUPER PI

Message quoted 1 times
------------------------------ Q6600@3.4+ TT V1 Cooler,SAPPHIRE HD 4870X2,ASUS MAXIMUS FORMULA,4GB OCZ DDR2 800,LG W2452V 1920x1200
 Reply to Maziar
bildo123   03-12-2008 at 07:15:40 PM
- 0 +

Maziar wrote :

ORTHOS
PRIME 95
OCCT
SUPER PI



In detail you should be able to run Prime 95 FFT's for at Least 8 hours, Blend test for 12.
For fun you can run memtest86+ for 12 hours to see if your memory is good too...that is if you pass a FFT but fail Blend.

------------------------------ The computer allows you to make mistakes faster than any other invention, with the possible exception of handguns and tequila- Mitch Ratcliffe
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Evilonigiri   03-12-2008 at 10:48:54 PM
- 0 +

Actually, you're supposed to run Blend first, dropping the multiplier of the cpu by one. Then after 12hours you run FFTs for 8hours with the multiplier back up.

This way if the memory is unstable, it doesn't end up failing the FFTs, giving the false impression that the cpu is unstable.

Message quoted 2 times
------------------------------ "Nvidia, the Way It's Meant to be PAID Played! - Corrado
*Lesbian Lover Club* - founder Assman
 Reply to Evilonigiri
bildo123   03-13-2008 at 05:46:11 PM
- 0 +

Evilonigiri wrote :

Actually, you're supposed to run Blend first, dropping the multiplier of the cpu by one. Then after 12hours you run FFTs for 8hours with the multiplier back up.

This way if the memory is unstable, it doesn't end up failing the FFTs, giving the false impression that the cpu is unstable.



^
|
..yea, what he said | :sol:

------------------------------ The computer allows you to make mistakes faster than any other invention, with the possible exception of handguns and tequila- Mitch Ratcliffe
 Reply to bildo123
Evilonigiri   03-14-2008 at 01:13:38 AM
- 0 +

I had to learn it the hard way. :(

Experience is priceless, trust me.

------------------------------ "Nvidia, the Way It's Meant to be PAID Played! - Corrado
*Lesbian Lover Club* - founder Assman
 Reply to Evilonigiri
Billiardicus   03-19-2008 at 11:24:42 PM
- 0 +

Evilonigiri wrote :

Actually, you're supposed to run Blend first, dropping the multiplier of the cpu by one. Then after 12hours you run FFTs for 8hours with the multiplier back up.

This way if the memory is unstable, it doesn't end up failing the FFTs, giving the false impression that the cpu is unstable.



Woah, I read the OC sticked guide and it didn't say anything about running blend tests. Can you provide more detail?

I've got my memory at 1:1 ratio which actually underclocks it a bit. Should I be worried about it being stable?

Message quoted 1 times
Reply to Billiardicus
Evilonigiri   03-20-2008 at 02:58:18 AM
- 0 +

Billiardicus wrote :

Woah, I read the OC sticked guide and it didn't say anything about running blend tests. Can you provide more detail?

I've got my memory at 1:1 ratio which actually underclocks it a bit. Should I be worried about it being stable?


Interesting. Upon closer look, there isn't any reference to blend test, unless I missed it...I'll need to talk to graysky on this one.

Basically, blend test is to stress test your ram. If an error appears, it's most likely due to the ram, however it could also be due to the motherboard. Then you would have to change the settings around to get it stable. Also, an error can appear due to cpu instability, so that's why you want to lower the cpu multiplier by one or more and set the vcore to something you know is stable on (ex: 9x400 = 3.6GHz ---> 8x400 = 3.2GHz stable vcore at 1.4V). That way you can eliminate some variables.

Then you run blend test for a recommended 12hours, more the better. If the specified ram setting is 4-4-4-12 800MHz at 2.1v and you want to use those settings, it's usually rock stable so their is no point in stress testing, although in my case it went wrong. Anyways, you change the ram settings around to your liking, the test away. If an error appears and the fsb is lower than 350MHz, it's probably due to your ram. If you haven't touched your Mobo voltages and your fsb is greater than 350MHz, it could be NB, SB, fsb, or ram that's causing the issues. You'll have to pin point it yourself.

If you haven't experienced any instabilities, you're probably fine.

------------------------------ "Nvidia, the Way It's Meant to be PAID Played! - Corrado
*Lesbian Lover Club* - founder Assman
 Reply to Evilonigiri
Billiardicus   03-20-2008 at 04:15:37 PM
- 0 +

Okay. So far I've only ran small FFT's. I can get a failure in 3 ways:
1. Error (I've always assumed it's the processor.
2. Crash (again I assume processor)
3. TM2 (Thermal Monitoring) kicks in. This lowers the multiplier to 6x when the "CPU gets too hot." Seems to kick in after 65C. Not sure why since the chip is rated higher than that, but I want to stay under 65C anyway.

My memory specs a 2.2v (so I set the mobo to +4). At 1:1 ratio, it's only at 711mhz so I figure it should be okay....

How do you tell if it's the NB, SB, etc?

Reply to Billiardicus
Evilonigiri   03-21-2008 at 12:37:24 AM
- 0 +

Well, you set the ram to a setting that you know is stable. There are other ways, but this is the safest and easiest.

------------------------------ "Nvidia, the Way It's Meant to be PAID Played! - Corrado
*Lesbian Lover Club* - founder Assman
 Reply to Evilonigiri
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