I'm considering buying a configure your own pc from o/c firstly i own a 5770 vapor X in my current system and i'm considering using this in crossfire mode with a second one.The system i'm thinking of is Coolermaster CM690-II Advanced Case - Black, Intel Core i5-2500K 3.30GHz Quad Core Processor,Stage 4: Overclock of CPU/Memory - 25% Overclock (Processor speed x1.25 / Max Attainable RAM Speed),I'm considering doing this myself,Akasa Venom CPU Cooler, Asus P8P67 PRO Intel P67 (Socket 1155) DDR3 Motherboard **B3 REVISION**,Corsair Vengeance 8GB 1600MHz C8 Memory Kit,OCZ Vertex 2E 120GB Solid State Hard Drive,Corsair TX 850W V2 Power Supply,Plus a Iiyama ProLite B2712HDS 27" Widescreen LCD Monitor - Black.Any of you thoughts will be appreciated.(my wife will kill me).I'm only home at weekends so i can't reply promptly thanks Simon.