Hi, I just got an 8XAGP XFX GeForce 6800 XT Xtreme (aka 6800 GS/XT, more specs@link below) and I have put it in my old Dell Optiplex GX270 Mini Tower. I know it has a 250W power supply and I read on the comment at the below link that it should have at least a 400W, so now I'm worried it will be killed. When I installed it, I gave it a dedicated power cable (one for cd drive and floppy, 2nd for two HDs, 3rd for the card). What should I do?
It may work now, but as soon as you push that card in an intensive game, your computer may crash or even have a brownout. Worst case, your PSU would go up in smoke.
Changing a PSU is really easy, just unscrew the 4 screws on the rear of the case holding the PSU. The cables for the mobo and such are self explanatory, put in new PSU, then put 4 screws back, it would take you at most 30 minutes to do this. The best way to learn is hands on experience