pc keeps rebboting goin mad

[donski]

Intel Core 2 Duo E8400 LGA775 'Wolfdale' 3.00GHz
(1333FSB) - Retail
£129.99 x 1 - Asus Maximus Formula Intel X38 (Socket 775) PCI-Express
DDR2 Motherboard
£159.99 x 1 - BFG GeForce 8800 GTS OC 512MB GDDR3 HDTV/Dual DVI
(PCI-Express) - Retail
£99.99 x 1 - Corsair 4GB DDR2 XMS2 Dominator PC2-8500C5 TwinX (2x2GB)
Supplied with Airflow Fan (TWIN2X4096-8500C5DF)
£79.99 x 1 - Corsair TX 750W ATX2.2 SLI Compliant PSU
thats my specs pc was running fine for 3 days then just randomly rebbot when it got to welcome screen on xp it was all corrupt and rebbot again now every time gets to welcom secreen it just reboots.
i have tred changing graphics card didnt help also tred difrent copy xp , tred takin 2 gig of the memory out still no joy.
i thought it was mother board sent it back to get tested and they said mother board was fine and that it was maybeeit was a driver issue but had no probs with the pc for 3 days

please help dnt have clue whats wrong with it just keeps rebboting at welcome screen all time

tanks for any guidence

 

[Scotteq]

Random reboots - The first thing I check is the power supply and power connections. If you're sure those are good, then next step is to put in your XP discs and repair your installation.

 

[badgtx1969]

No overclock on processor and GPU?

 

[evongugg]

I had the same problem. Multiple reboots at cold startup. It was a bad power supply. Try a Windows repair, if you don't have a spare power supply at hand.

 

[Shadow703793]

Run Memtest86+ and a also if the RAM voltage is not at 2.2-2.3v increase the voltage. Also run a manufacture tool to check for disk errors. (Ie. SeaTools DOS for a Seagate drive). It could also be PSU but highly unlikely imo, since the PSU is a high quality one.