Just to make sure that all of these are compatable, as well as a little advice on a Graphics card.
Processor: Intel i5 2500k 3.3ghz
Ram: Ripjaws 8gb- 1866
Motherboard: AsRock Z77 (intel)
Power supply: Bluestar 650 watt
HDD: Seagate 500gb
Graphics: Here are my choices: Radeon hd 7770 or the 6850. Not sure which one to get. I hear both good things and bad things about both and I kinda need a deciding factor. All I want is to be able to play my games without lag.