Re: What to upgrade
I just saw your specs and what I really think you need to upgrade is that X2 6000. Even if you get a 5750 that will be bottlenecked a bit by the CPU.
The 4650 you have on the other hand should do ok with a newer CPU.
8350@defaults (burning in)
Antec 620/w 2 Silverstone FM121 push/pull
Asrock 990FX Pro Fatality
32GB Gskill Sniper 1600@XMP 9-9-9-24 2T (till I OC cpu and tweak this shit)
Kingston HyperX 3K 120GB SSD/500GB WD Blue
Asus Xonar D2
Logitech G510/Razer Deathadder
TT ToughPower 775W
Sony CRT 21"
Win 8 Enterprise x64/Linux Mint VM