Check my build gaming pc if its good for the price

Looks pretty good for the price and should be able to run those games with medium settings at good FPS. Don't switch to i3 since it will be more expensive if you want one that will be the same as the AMD one.
 
Yeah, the build is fine mostly, I only got you a better price on the same ram (basically) and a cheaper higher quality PSU. You don't have any hard drives or optical drives in there though, won't be able to install that windows 7 (you should probably consider getting 8 as it performs slightly better)

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($99.99 @ Newegg)
Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard ($56.98 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($54.23 @ Newegg)
Video Card: XFX Radeon R9 280 3GB Double Dissipation Video Card ($184.99 @ Micro Center)
Case: Cooler Master Elite 431 Plus (Black) ATX Mid Tower Case ($47.99 @ SuperBiiz)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($58.99 @ SuperBiiz)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($86.89 @ OutletPC)
Total: $594.55
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-04-20 14:07 EDT-0400
 
i would suggest either go i3 4xxx or a lot better mobo (meaning atleast 970 series with atleast 6+2 phase vrm , since depending on games you would soon find out how much higher clocks you need to actually run them at sustained 55fps, actually just go for i3 if you can go for i3 43xx if not then the i3 41xx will do just fine as well, both perform better in almost all games, and you don't need a expensive board for it, any z87/97 or H/Q/B85 or q87 will be good enough, though i would suggest going with z series since those support higher speed memory and memory oc
 


i already got a hard drive to install windows in and isnt a 600w is better then 550 w psu
 


oh ok thanks i swich it then thanks for telling me this