My computer turns itself off when... Closed

Question

Hello,

I have a problem whit my computer that I do not know how to fix. Some days ago my graf-card died and I was forced to buy a new one. It came down to GeForce GTX 285 XXX from XfX. But when installed and every thing looked like heaven itself, it turned into hell.

When using my computer to surf on the internett or play games like Battlefield 2, Eve-online etc it works fine. But when I try to play Assassins Creed, Crysis or Call of duty 4 the computer turned itself off like some one pushing a light swich. No bluescreen, no logging off message... just the empty black screen.

To fix this I tried to flash the Bios and update it. I tried to reinstall the graf-card drivers and also to remove some of the HD to free W from the PSU. When I first tried removing the HD, Crysis worked fine untill 5 min into the game, and the computer turned itself off again.

I talked to the local shop, and they have taken a look, but did not find anything wrong. I hate to send my computer back to the shop so I'm hoping to get some help here. All the games I have worked fine on the old graf-card a GeForce 8800 GTX. 

My computer is a self-made one from 2007. (My friends and I think that my PSU have seen it's best days and is not giving out 750W anymore, and that I currently are running the computer almost at the PSU max output. So when ever I try to play a game the new graf-card needs more power and therfor the computer turns itself off)

But do anyone els have a better idee?

PSU: 750W
Motherbord: ASUS P5N32-E SLI Pluss
Ram: 3 GB Ram
Intel Core 2 CPU 6400 @ 2.13GHz
Graf-card: XfX GeForce GTX 285 XXX
hardrives x 4
Fan x 3
Operating System Windows XP Pro Service pack 3
Cabinet T40 with a front display
8 USB ports.

Russ · Accepted Answer

dude 
we have a same problem my computer to shut off without warning if i play pc games especially 3d games and watching vids... I dont know whats the problem. but i surfing in net it not shut off... Please help me dude...

Borderlands Man · Answer

that happens to me when i play borderlands, i get 15 mins into the game then screen says 'no signal' and shuts down, but for some reason it doesnt turn off or anything when i play Call of Duty 6

diamid · Answer

I bought a new powersupply. I testet my old one and it was putting out only 75% of what It should have done. So I a new and to powerfull one was instaled. Problem fixed

Diffly · Answer

I Try To Play Anything , Even Downloaded Online Games
AND BOOM, my computer has blacked out, it is still running but the screen just says

NO SIGNAL INPUT

nazeer · Answer

can u tell me how much hard disk u r using? and can u tell me how mush Assassins Creed, Crysis will be takes i thinks in u games have some virus files check it and after unstall and again reinstall k

Diffly · Answer

My Power Source Is 480W at the moment and im thinking of buying a 750W power source so i will tell you what happens

diamid · Answer

Hey guys, I found the answer to my problem. I bought a new power supply, 850W. Now working fine!

Stray92 · Answer

Ok so there are a number of things that can cause this unexpected shut down 
and you metioned that you were playing games. Its most likely that the computer
doesn't have the right graphic card or depending on the operating system the game 
is simply to much for the computer to handle

brianwhitt77 · Answer

Hello, 

The problem might b sourcing from different issues, please check whether it is coming from its RAM slot, motherboard, graphic card or the power supplying unit. Also indicate whether it is not simply coming from overheating issues. 

Thanks in advance.

My computer turns itself off when...

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