not stable but prime95 stable :(

[Korke]

Hello, my computer was stable for 19 hours and 30 minutes without a single problem, so i decided to shut Prime95 since it seem stable then i went to play cod to try if everything works, then it works for 3-5 minutes and then some stupid lines appeared and the screen went black and then those lines appeared again.. so i decided to shut down the comp, what can the problem be? my pci-e slot is running on 100... i haven't overclocked the graphic card.
and i havent overheated anything
Motherboard: MSI K8N DIAMOND SLI (S939), Cpu: Amd Athlon 64 3000+, RAM: 512mb PC3200 Twinmos Speed Premium (BH-5)
HDD: 80gb hdd rpm 7400.

 

[Ned_Flanders]

...and this doesn't happen @ stock speeds?

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[Korke]

nope, it works perfectly fine when at stock speed . What shall i do?

 

[scottchen]

Do you have a 6600gt or 6600 card?

 

[jammydodger]

Boost AGP voltage to 1.65v

 

[Korke]

i got a sapphire Radeon X300, Hyper R 480W, i forgot to add that information on the first post, and i can't change agp voltage since i got a pci-e motherboard. I haven't even overclocked the graphic card, please.. fellow overclockers. what can i do ?

 

[scottchen]

Reseat the video card, and make sure the PCB isn't bent even slightly, and make sure the heatsink is making contact with the core.

 

[Korke]

but... why would it make this sort of troubles when i haven't even overclocked it ?? :S. and how do i reset it? i have reseted my cmos, still there

 

[scottchen]

Why wouldn't it happen if heatsink isn't making contact with core? many first edition of the 6600's has that problem, reaching 120-140C just sitting in idle at stock everything. We're not talking anything about overclocking here, just overheating. Who said reset? I said reseat, pull it out a nd plug the card back in.

 

[Korke]

then.. what the hell does that got to do with me? i haven't overclocked the card and when i haven't overclocked the computer at all, everything works perfectly.. and i don't even got a 6600, i got a freakin´ X300 which isnt overclocked and it runs perfectly when the cpu isnt overclocked! :S

 

[jammydodger]

Maybe when you overclock your system you are also overclocking the PCI-e bus, this could be the cause of the problem. Do you have the PCI-e bus locked?

 

[chiangww]

prime95 does not test about your graphic system. It must be something wrong on your graphic system, maybe you OC graphic adapter?



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[jammydodger]

No [-peep-] sherlock