I am getting a new video card for my Dell 8300. The new card is a GeForce 7300GT 512 MB DDR2. I was advised that I will need to upgrade my PSU, but have heard that replacing a PSU for the Dell 8300 is difficult. Does anyone have any instructions? I am looking at getting a Silencer 410 Dell2 PSU, as it is advertised as being specifically compatible for the Dell 8300.