PC restart over and over.

By darkthunder
Dec 13, 2005
  1. Hi people
    I need help with my PC.
    He restarts and don’t give any reason for doing that.
    No blue screens. Just restart 1 or 2 times per day.
    Someone help me please
    Thanks in advance
  2. Eric Legge

    Eric Legge TS Rookie Posts: 132

    A break in the supply of power could be the cause of that.

    If the power supply lets off just a little bit, the PC would restart.

    You could have a faulty power supply unit, or a bad source of power.

    I would try another power supply - a quality unit recommended for the processor installed. If that doesn't work I would then buy an UPS - uninterruptible power supply - that would provide continous quality power to the PC.
  3. cpc2004

    cpc2004 TS Evangelist Posts: 1,994

    Hi DarkThunder,

    The culprit is faulty memory. You can run memtest to stress the ram. If memtest reports the ram is faulty, ram is bad. However Memtest is not a perfect tool to test the memory as some faulty ram can pass memtest.

    1. Check the temperature of the CPU and make sure that it is not overheat (ie temperature < 60C)
    Make sure that the CPU fan works properly
    2. Reseat the memory stick to another memory slot. Reseat video card as well.
    3. Downclock the ram. Check to default setting if you video card is overclocked.
    4. Clean the dust inside the computer case
    5. Make sure that the ram is compatible to the motherboard
    6. Check the bios setting about memory timing and make sure that it is on
    For example : DIMM1 and DIMM2 do not have the same timing.
    DIMM1: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (2.5-3-3-8 @ 200 MHz) (2.0-3-3-7 @ 166 MHz)
    DIMM2: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz)
    DIMM3: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz)
    7. Make sure that your PSU have adequate power to drive all the hardware including USB devices
    8. Run chkdsk /r at command prompt
    9. Run 3DMark 2005 to test your video card
    10. Upgrade BIOS

    If it still crashes, diagnostic which memory stick is faulty
    Take out one memory stick. If windows does not crash, the removed memory stick is faulty.
  4. darkthunder

    darkthunder TS Rookie Topic Starter

    Thanks cpc2004 and Eric Legge.
    I will do your suggestions and post the results.
    Thanks again
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