Computer spontaneously turns off and restarts

Discussion in 'OT Technology' started by Soren, Aug 31, 2008.

  1. Soren

    Soren OT Supporter

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    Hey guys I just built my computer and it seemed to work well at first. But after some stress testing with my 9800 GTX+ it started doing rainbow snow effects. It seemed to do them after a little period of working normally.

    Now today the computer keeps restarting extremely quickly whenever I play graphically intensive games (rainbow snow seems to have disappeared) and after a couple hours in desktop mode.

    The power supply is a BFG rated at 550w with quad 20A 12V rails so I think it should easily supprot the 9800, but could either or both parts be defective?
     
  2. lowfat

    lowfat 24/Mac/SciFi/PC Crew OT Supporter

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    It wouldn't be a power supply. They either work or they don't. And 550W is definitely big enough. What are the GPU temps like while gaming?
     
  3. Soren

    Soren OT Supporter

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    I think the temperature was at maybe 70C.

    I had the fan on automatic and that's how high it would climb during benchmarks.

    Now my computer shuts down extremely frequently. I can't even turn it on now because it will shut down as soon as I enter Windows (or sooner).
     
  4. trouphaz

    trouphaz New Member

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    i don't know, i have heard of power supplies either not giving enough power or just starting to fail and causing very weird problems including blue screens and spontaneous reboots due to parts receiving insufficient juice. i couldn't say for certain that is the issue, but i wouldn't exclude the power supply just yet.
     
  5. pitchblue

    pitchblue New Member

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    What happens when it restarts? Just a normal reboot? Or does it hang at a black screen?
     
  6. Hate Crime

    Hate Crime Don't Hate OT Supporter

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    f8 at startup, disable automatic restart on system failure and post the bsod error.
     
  7. Soren

    Soren OT Supporter

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    It actually hangs at a black screen after restart for roughly 10 seconds before posting.

    I'll try posting the BSOD error.

    edit: Damn, it looks like I can't even enter BIOS now. Basically it just hangs on a black screen while the fan is going at full speed. Not even a beep.
     
  8. Hate Crime

    Hate Crime Don't Hate OT Supporter

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    Back to square one, remove all but memory chip, disconnect hard drive and cd roms and start there.
     
  9. FLY-FAST

    FLY-FAST OT Supporter

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    lsass.exe vulnerability?
     
  10. Soren

    Soren OT Supporter

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    Ok it's working again.

    But I wasn't able to get a BSOD.

    I tried to play a game since that's what makes it crash, but all it did was display a normal game graphics for about 30 seconds before warping and displaying distorted graphics. I ended up having to turn the computer off manually.
     
  11. waldo98

    waldo98 OT Supporter

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    Have you try re-seeding your graphics card? The same symptoms was happening to a buddy of mine and the problem was that his graphics card wasn't plugged in all the way.
     
  12. Soren

    Soren OT Supporter

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    i tried to wiggle the card in more and replugged the 2 6pin connectors,

    I didn't, however, unscrew the mounting and take out and put back in the video card. is that what you mean by reseeding?
     
  13. Stilgar1973

    Stilgar1973 New Member

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    FWIW:
    This isn't true at all. There can be all manner of screw ups with power supplies. They can cause problems in the PC that are problematic to diagnose.
    I have had a couple situations where I couldn't pin a problem, then I replaced the power supply and *poof* problem went away never to return.

    This is why I sometimes recommend paying cash for a power supply, dropping it in and seeing what happens.

    Having said that...
    I don't think this is a power supply issue.

    And it isn't re-seeding, it is re-seating.
    You just take it out and put it back in again.

    I think there is a pretty good chance you got a defective video card.
     
  14. Kieffer87

    Kieffer87 Orly OT Supporter

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    If you have onboard graphics or the ability to try out a different video card do that and see if it fixes the problem. Sounds like a bad video card though.
     
  15. Soren

    Soren OT Supporter

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    so I reseated the video card and only used one screw -- in the middle -- and it works fine now.

    thanks for the help guys.
     
  16. Soren

    Soren OT Supporter

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    Spoke too soon. Problem is back but now it's just the graphics acting up in games.

    Here are some examples:

    [​IMG][​IMG][​IMG][​IMG][​IMG][​IMG]
     
  17. Soren

    Soren OT Supporter

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    Some games work fine for a long time. For example, 4 of those pics are from UT3 yet I could play UT3 all day yesterday. Now it's constantly glitching out which makes me suspect its the graphic card and not the power supply.
     
  18. Doomsday

    Doomsday XXX

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    rma the card
     
  19. Soren

    Soren OT Supporter

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    I'm heading to the store to get an exchange since the EVGA tech support guy said an RMA would take much longer.
     

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