Hi these are the specs of my computer, and i was wondering how i should upgrade my computer. I bought this computer last september if that helps. I use it mostly for gaming and the 7950 doesn't really cut it with the my favorite games like call of duty 4 and universe at war with highest specs. I am willing to spend around 400-500 dollars to upgrade my computer. I'm mostly looking for a video card suggestion and maybe some other things.Thanks, i really appreciate it.