I'm also getting a computer. I ordered a custom, everything is fine until I realized my power supply is wrong. Now I will get shipped an GTX 460 with a power supply with no capability to comprehend such need. The PC will be in warranty too, so I won't be able to open the case and put another supply on. (I got a prebuilt PC and asked the people there to add that video card, however, they didn't tell me if they are compatible or not, them loving greedy bastards.).
The specs would've been:
Intel i5 2.8 GHz Quad-Core (11.2 GHz total)
Palit NVIDIA GeForce GTX460 Sonic 1gb DDR5
2 terrabytes hard drive (Which I have no idea what I will use on)
4 GB DDR3
forget my life.