Currently in process of building a new rig. Now stumped on what graphics card to get. Was toss up between 7970 and a 680, but with the recent ati drivers making more sense to get the 7970 (though I realise some will say 7950 best bang for buck). Now question is which 7970?...I hear some are voltage locked, some sound like a jet engine. Ones that keep cropping up are the MSI Lightning, Sapphire Vapor-X Ghz Ed and the Gigabyte GHz one. Opinions please 
