Computer keeps rebooting

Hello,

My computer keeps rebooting. My monitor doesn't recieve any signal at all.
When i power it on, it reboots after 3-4 seconds and reboot again, again and so on.

I've tried pulling out one of the RAM blocks and then switching to the other one - same thing.
I've tried pulling out the GFX card. Then the computer starts just normal (atleast what i know of, since i can't see anything without the gfx card).

I'm not able to test my gfx in another computer. Any suggestions? The computer is around 10 months old and there is almost no dust inside the case.

My hardware specs are:

Core 2 Quad Q9550 12 MB 2833 @ 2833
Gigabyte GA-EP45-DQ6
Corsair XMS2 2 x 2 GB
Club 3D Radeon HD 4870X2 (2 GB)
WD Caviar Blue WD6400AAKS 640GB (SATA)
Corsair TX750W

Thank you

/Feller
3 answers Last reply
More about computer rebooting
  1. Hey Feller,sorry,couldn't resist,,now then as you are not able to see anything,,can you take your gfx card to a store and have it tested,or can/do you have a dos boot disk,or can you get some form of linux that will run from a cd/dvd,or failing any of the above can you get your hands on a cheap but functional pci-e video card,of course if it works windoze will complain all over the place,but this might shed some light..:)
  2. Probably your Gfx is busted..most likely..
  3. I have now testet the computer with another gfx. A PCI gfx with passive cooling.
    The computer does the excact same.

    My motherboard has some different LED's to indicate problems etc.

    These are flashing once everytime the computer reboots:

    A blue LED next to the 12V plug.

    And these 4
    - GD1 (green) "Normal working conditions"
    - GD2 (yellow) "Ecessive overvoltage"
    - MD1 (green) "Normal working conditions"
    - MD2 (yellow) Excessive overvoltage"

    In the motherboard manual it says that GD is PCIe and MD is memory.

    I have also installed a speaker on the motherboard.
    It beeps once everytime the LED's flashes.
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