2600k on the mentioned motherboard, antec 700w psu, 8gigs of 1333 ram, two reference HD 7950 cards in crossfire. I'm using an evo 212 air cooler. All.this is in an antec 1200 case
Good temps for an EVO by the way.
Anyway, WHICH EXACT Antec power supply? I think you may be slightly under-powered with 2 HD7950s in your system. But then I need to know your EXACT PSU.