Mu grafic card dies and i need help =(

[Ampe79]

Hello.
I am running windows 7 64 on my computer and i do have 4gb ram and a amd athlon 6400+ x2.
After installing windows 7 a few weeks ago my Gfx started to hang, back then i had a nvidia gf 9600 512 mb and i thought the card was broken so i bought a radeon hd5750 1gb ddr5 and sure it worked super but suddenly the problem was back.
The problem is that when i start a game as wow or Cs the gfx hangs and al i see is one colour al over the display, but the sound is ok.
I have tried to do ctrl alt delete but it doesent help. This occures at random times.
I am so tired of this and i would love some suggestions on what the problem can be, i have tried to find the minidump files but i dont have any since it isnt a blue screen, and i have done a test using a freeway program (cpu tester pro) and it reported no errors and the system is cool and stable otherwise.

Thanks

Ampe

 

[Ampe79]

Bumb

 

[whs]

That could be a heat problem or a problem with your PSU.

 

[Ampe79]

Ok. the powersupply im using now is 450 watts i think, but then its a cheap thingy, is there any program that can show me if its giving me the correct power or if its to weak for my system?

Thanks

 

[whs]

There are programs, but I have never used one myself so I cannot recommend one. Try Google.