Please Help PC is restarting during Bootup

[SPSUviper]

Hi all,

This is my last ditch effort to figure out what my computer is doing. About 3 weeks ago my computer started rebooting right after the windows logo shows on the screen, the screen goes black like it's about to go the the log-in screen then it reboots. After that reboot it goes to safe mode. From there I can start in Safe mode then after restarting from safe mode it would boot fine and stay on until I turn it off.

Just this morning though I went through all the above steps and it would still not boot to the log-in screen. Some times it wouldn't even make it second boot screen (the one where it asks to boot from CD). It is completely inconsistent and I can't pin point it to anything. The strangest thing is last night I would restart it fine as many times as I wanted to. that was after it had been running for a while.

I did a memtest last week and it went to 300% with no errors. Any then you all can suggest would be a huge help. I'm going to put my harddrive in my roommates computer in a minute and make sure it's not a windows thing.

Here are some specs on the computer.

Windows XP Pro
2.2GHz AMD Athlon 64 3500+
Gigabyte k8n-SLI mobo
2GB DDR
500W PS that came with the case
(2) XFX Nvidia Geforce 7600 in SLI

Thanks for the help!

 

[cfvh600]

Could you perhaps post the specs of your PSU please?

 

[SPSUviper]

The PSU is as follows.

Max power output 430-460W
+3.3 & +5v max output is 140W with Max 20A & 25A respectively.
+12v1 & +12v2 max output is 150W with max 10A and 8 A respectively. It is made by MGE company.

Also my video cards are 6800's. I tried to remember them from memory but just checked everything.

I also tried my harddrive in my buddies computer and it booted fine several times. so I'm thinking hardware....

 

[Onus]

MGE is on Tier-5 ("Do not buy") of the list at http://www.tomswiki.com/page/Tiered+PSU+Listings?t=anon.
Particularly as it came with your case, it is probably a cheap sparker that is on its way out. Hopefully it won't haul any other parts of your PC with it.
A quality 400W-500W unit from Tier-3 or better would make a good replacement. FSP makes some at the lower end of the price range (e.g. $58) that would be good.

 

[evongugg]

Try doing a Windows Repair.
It may only be a software problem.