For bf3 multi-player and arma2 and AMD build will do better due to good scaling in those games (bf3 64man in particular needs lots of coars )
Something like this
CSS is a pretty lax game, pretty much an dual core after core 2 duo/athlon II can handle it
(if you play the 60 man mods though it can be taxing on the cpu)
A good build, I like the budgeting of 2x the cpu price for the graphics card.
Corsair CX430 may be pushing it for a 7850. Yes, it has the required 6 pin power lead, and can deliver 32 12v+ amps. and it is of decent quality.
AMD recommends a 500w psu with one 6 pin pci-e power connector.
It is silent on the 12v amps required. http://www.amd.com/us/products/desktop/graphics/7000/78...