My computer is pretty dated. It has an Asustek P5K motherboard, Intel Core 2 Duo E6750 socket 775 CPU, an ATI Radeon HD 2400 Pro GPU, and a Cooler Master eXtreme Power Plus 500W (linked below).
I would really like to upgrade the graphics card (maybe a Geforce one with at least 1GB so I can use graphics acceleration on Adobe Premiere), but the I'm not sure what my PSU will be able to handle (it's pretty poorly rated). Could anyone recommend something? As long as it's a significant upgrade from my 2400 Pro, it'll do. If anyone can also recommend a processor upgrade, I'd appreciate it. Thanks!
Dang, people are having problems with the PSU I have the the 550Ti, so that might be a no-go. If I really want the GTX 460, could you recommend a power supply?
Even if you upgrade the PSU, the 460 will still be a bottleneck. Do what the other members are telling you. Build a new system as whole. You're likely to waste more money on trying to upgrade your current ones.