Vault boy Eddie said:
Well up to now I've upgraded my ram from 2 to 4 gigs, bought the 512 9500GTS vid card, upgraded the power supply to 450 if i'm not mistaken. It's a Core 2 Duo 1.6ghz so 3.2 total. It passes with flying colors all "can you run it" tests with the exception of the processor.
Well first off, 1.6ghz is 1.6ghz... dual core doesn't double the speed, it just means 2 cores are running at 1.6ghz. Anyway that's a really old crappy CPU. My gf had one in her HP desktop.
We ended up upgrading her to a E5700 which is a core 2 duo 2.8ghz CPU and it's a lot faster. But to do that we needed to upgrade the motherboard because the one it came with didn't support the new CPU. So together that was $150. We then upgraded to 4 gigs RAM, but you already have that. We then upgraded to Windows 7 64bit (you need a 64 bit OS to use more than ~3.5gigs of RAM).
So yeah if your motherboard supports better CPUs then just get around a 3ghz dual core, otherwise you may also need to swap the motherboard. BioStar makes cheap ones.
You would also probably want a new video card. A 5770, 450, 550, 6790 are all very good options and probably about as powerful as your system can handle.
All together for cpu, mobo, and gpu you're looking at less than $300