What does it mean if Prime95 fails at default CPU clocks?

[KIAman]

I got this xp2100+ AIUHB 0301 and i immediately bumped the fsb to 166 to make it xp2700+. I bumped the vcore up to 1.7 just incase. I ran prime95 but failed before the first test was even done.

So I cranked it lower and lower till I even hit my default speeds 1734mhz and it still fails within the first or second test. What does this mean?? Bad chip?

 

[drewski]

did it run ok with your old cpu on your setup?

i was having instability @ default speeds w/ my 2100+. not just prime95, but IE, windows explorer would just quit.

in a fit of madness i did a reformat & clean install of windows. problem solved! now i'm at 2.2GHz (11*200) w/ 4222 memory timings. 1.775 vCore

 

[KIAman]

Hmm, my old 1700+ worked fine and ran prime95 oced to 2000mhz. Maybe I need a clean install of OS, but nothing has changed. I dont see why this would be neccessary.

 

[drewski]

Originally posted by: KIAman
Hmm, my old 1700+ worked fine and ran prime95 oced to 2000mhz. Maybe I need a clean install of OS, but nothing has changed. I dont see why this would be neccessary.

yeah, i agree. the unstable system i had was a new install w/ this board & cpu.

 

[DivideBYZero]

I've had Prime95 errors that were caused by an obscure OS file, corrupted by my high FSB.

Try a clean OS install first.

 

[Actaeon]

Bad PSU?

Reformat, reinstall OS, and try again. If that doesn't help, I would assume the PSU can't feed the CPU enough voltage.

 

[JimmyFish]

Check your voltages are up to par, as Actaeon said, it could be down to a poor PSU.

 

[EdipisReks]

the first thing i would do is reinstall windows. i would then put everything to bog standard and see if it is stable. then, go gradually increase speeds until you hit instability.

 

[KIAman]

Kewl, thanks guys. Imma try to do a reinstall first today, then check some stability. I will post later in the afternoon with results.

 

[Shimmishim]

wait wait... before you go reinstall windows... check the rails on yoru voltage for your PSU...

you can use USDM if you have an 8rda+ or MBM which you can download from the top of this forum...

please report your rail readings here...

your 3.3V and 5V

also... how big is your PSU? and what kind?

 

[KIAman]

I have an epox board and using USDM, I have a 3.3 voltage anywhere from 3.28-3.3 at load, my 5v rail is 5.018 idle and drops down to around 4.975 under full load. My vcore which is default 1.6v never drops even under load.
I have an Enhance 350w PSU which has a 220w 3.3v+5v combined output.

I did notice when I overclock my chip to 13x166 @ 1.7v the vcore does start varying under load anywhere from 1.685- 1.7v. And my 5v drops even further around 4.895. And also I can audibly head my fans crank a little louder when I have my cpu overclocked. Is that normal? My fans are not rheostat controlled at all, but I can definately hear the fans spool a little louder when I either overclock or run the processor under full load.

 

[ChampionAtTufshop]

lol i can hear the same diff with my cpu idle /under load

i think it has to do with psu and not supplying a constant voltage....but whatever

voltages look ok...
have you tried running memtest86?

 

[KIAman]

I will try memtest right now, thanks for the advice.

 

[KIAman]

Memetest ran fine. So then its reinstallation?

 

[ChampionAtTufshop]

thist ime try memtest86 with cpu cache enabled for all tests
you let it complete the whole series of "loops" correct?

 

[KIAman]

Ugh, something went wrong and said someting about gdi32.dll and my computer wouldnt boot anymore. I reinstalled windows and everything works fine now. Another thing was everytime I tried to set my page file to a custom size, my computer would reboot.

Well, I have only been on this for 6 hours but nothing has gone wrong so far and I can freely adjust the page file. Thanks for the help guys.

BTW imma try memtest with cache enable just in case too.

 

[Budman]

Be sure to run it 36 days :Q

 

[KIAman]

I ran memtest on my new crucial 512mb pc2700 and it gave me over 500 errors. I think that contributed to my reformat....