To be honest upgrading your ram wont show you a huge gain and I would say its not worth it. The biggest thing you could do is to overclock your CPU from 2.66Ghz to something a bit more. Even 3.0Ghz should show you an increase.
I would leave your PC hardware wise, as is, and begin to save up for a new system over the next several months. By the time you have enough the new processors would be out from both AMD and Intel and you might just be getting 5-10 times the PC you currently have for a decent price.
Thanks all the same!
Edited by fishslappedface - 2/11/11 at 7:31pm