realchaos :
Try to upgrade your processor to a FX-6300 with a decent 970 chipset motherboard for overclocking.
Up the psu to a XFX 550w or 650w (The 650w is only $5 more at NCIX)
Instead of the 750 or 660, see if you can get a R9-270 / 270X (They go for about ~$180)
Hard to recommend things because we need to know your budget and what games you want to play.
OK what I want to be able to play is games like GTA 4, Call of Duty Ghosts, and Battlefield 4 at low at a playable fps of 30+ on an old 720p monitor I have. I would also like to be able to play minecraft and record with fraps with a constant 40+ fps on a server. I also would like to spend under $400 preferably under $300.
Sorta updated build as I would like to do some light editing also:
AMD FX-6300 Vishera 4.1 GHZ Six-Core CPU $120
MSI GT 640 $75
MSI 760GM-P34 Motherboard (For Easy Overclocking) $52
Adata XPG V1.0 1600 8GB RAM $64
Corsair CX430 430w PSU $40
DIYPC FM08-W Case $24 (On Sale)
I already own a Hard Drive
Comes to about $375, any suggestions for a cheaper pc that will fit my needs?
BTW my current (REALLY REALLY OLD) PC that has an AMD Athlon x2 2 GHZ and a Radeon HD 6450 plays minecraft at 30+ fps with fraps but around 20 fps on a server so this is mainly where I want a performance Increase, also I want to play GTA with my friends at above 30 fps (No Recording) at 720p on low-madium (I dont mind turning graphics down, but hate putting the resolution at 1366 by 866 to be able to play like I do on my current system) The reason for the expensive cpu is that minecraft and fraps are more cpu based and so is editing. Also I dont think I will be needed an extremely good gpu since I currently dont play much but minecraft.