I have a Dell Optiplex 780 mini-tower that I bought used and did a little upgrading to. I added a little RAM to give it 12gb and added a 1TB hard drive. The cpu is a Core 2 Duo 3ghz. The video card is a Radeon HD 3400 card (512k memory). It appears that a 1GB HD7750 video card will work without having to upgrade the PSU (current one is 305w). These video cards can be picked up fairly inexpensively on the used market nowadays, but is the upgrade worth it? Would I notice an improvement in speed/performance? I'm only interested in doing this if it will help me in image processing where sometimes the system runs slower than I wish it to. Currently I'm running DPP, CS2, and trying to learn a little about LR5 and processing images from a 6D.
I am not concerned with gaming.
Feedback is much appreciated.