Hey guys, I'm new to computers but have been reading up on how to build computers. Right now I've compiled a list of the parts that I want to build. My main concerns are if all the parts I have chosen are compatible with each other, if overheating will be an issue, and if I forgot any parts that are critical in building a computer. If you guys have any suggestions feel free to citique my build. Also, I won't be needing an OS, monitor or other accessories. Thanks in advance.
GPU: XFX HD-577A-ZNFC Radeon HD 5770 (Juniper XT) 1GB. It is cheaper and will perform equal or better the older GTX 260's, plus give you DX11 support.
HDD: Drop your hard drive down to either the Samsung Spinpoint F3 or Seagate 7200.12 500GB hard drives. Either of these are faster than the WD 640GB Black.
PSU: If you don't plan on running SLI/Crossfire, you can drop down to the Corsair 650TX for additional savings.