Argh constant crashes

[Chronicle]

Hi
System specs are as follows:

kv8pro
3200 newcastle (i think)
asus 9600xt
2 x 512mb pc3200 ram (corsair value select and another brand (not budget))
2 hdd's (wd 120gb sata, hitatchi 80gb ide/pata)
1 cd drive (sony, cdrw/dvd drive)

Basically, i crash all the time. The screen goes blank then says "no signal". Sometimes (once every 15-20 times i'd say) it does come back on, and says something about some ati stuff, but it crashes even without any ati drivers (adn with the latest drivers).

What could be wrong? my psu is a generic 400watt i think (could be 450, can't remember)

 

[Chronicle]

It did have a a7n8x-e dlx, with 2800+, but i swapped heatsinks and broke either the cpu or mobo, i dunno, so i got new mobo (the 64bit one mentioned) and cpu (3200), its been since then, which has been since the summer.

 

[Chronicle]

Not really able to swap with other componants.
I don't think I have tried reseating the gfx card/ram.

IMO, i think it could be due to crap power supply, or i broke my gfx card. But thats just a guess