PC Build almost done

LOL, no. You've got a 240mm radiator on that cpu, it definantly won't overheat.

However, I suggest windows 8.1 so that you will be able to fully utilize all your hardware. Windows 7 will still do this, but windows 8.1 seems to get more work done out of newer computers.
 


could you specify please?
 


what's the difference? How will it perform better?