strange pc problem!

talwar

talwar

talwar

Associate
Joined
28 May 2009
Posts
9
I have built a PC a few months ago and these last three weeks it started to give me problems. the build's components are the below:

Phenom II 955 3.20GHz
Asus M4A78T-E AM3
HIPER M Type 780W
OCZ 4GB Platinum AMD edition
XFX Radeon HD4890
Windows 7 64bit

randomly the PC will just stall, loosing the video signal and after some secs it crashes and i would need to turn it off from the power button. when i switch it on again the graphics card's fan starts spinning to 100% speed and no signal what so ever. if i remove the 4890 and use the onboard card everything switches on normally.

i thought that it was an issue with the 4890 and so i tried it in a friends PC but everything went well as we played for more than an hour to give it a load.

i am thinking that it could be the PSU not giving enough current to the 4890 and thus having it stopped under load.

does anyone has some tips about this issue?

Thanks in advance
 
It shouldn't be a problem with the PSU since 780W are a lot! What are the ampere values on the Psu anyway? And maybe your card is overheating for some reason. Get yourself furmark and monitor the temps with speedfan or some similar program.
 
Have you tried Memtest, or have you been monitoring temps as Kushage mentioned. Speedfan/Realtemp/Hwmonitor will allow you to monitor temps. I like to keep HWMonitor running while I game and ALT+TAB out of the game periodically just to see where my temps are peaking when the computers under load for a period of time.
 
hi thanks for the fast replies! my PSU has 72A on the 12v rails..

i have run everest system stress test for the CPU, RAM and FPU for more than 1hr 30 mins with no problem handling the load, so i think they are fine. for the 4890 it is always around 57-60% not more when the problem happens. i will try to install furmark as Kushage said just to be sure!

i also am thinking that the 4890 is working well since on another computer it worked like a dream!
 
i thought that Hiper products were good quality!

i will download and test with that program. i tried to start furmark but it crashed as soon i download it so i hadn't had the time. i will try again tomorrow with both software!

yes i've narrowed it down to PSU or mobo fault, but don't know which one till now. i am waiting to try a friend's PSU with my PC to check what happens. everest sensors are saying that GPU VRM is only 1.35A don't know if it is good but according to some people its very low

yes i tried the 4890 in the second PCI-e slot and the same thing happened
 
i think the culprit is the PSU as i suspected becuase from the BIOS it is saying it is only getting 10.35V on the 12V rails!
 
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