MSI Radeon HD7750 OC 1GB DDR5 or EVGA GTX 650 DDR5 ?

I believe they're roughly equal in performance, give or take a few FPS in most games. Personally, I'd go with the 650 for the drivers and optimisations in games like Battlefield 3 and Borderlands 2.

I would go for hd7750 as there has been issues with gtx 650 playing games like WOW at very low fps which sucks. But hd7750 goes like bang playing it with 60 fps.

you'll choose an 850 Watt (minimum) PSU otherwise that's going to bottleneck the energy resources with distinct hardware. also, you'll desire a sixty 4 bit operating gadget and really commonly domicile windows 8 to which could are compatible subject matters with 32 bit computer video games.

That processor, two displays, and any of those GFX cards with that PSU is going to be a VERY close call. I would wait until you upgrade your PSU to invest in a GFX card.