Started mining in June, this is my rig, 2x HD 5850 and 1x HD 6850, planning to replace 6850 with a 58xx and add 1-2 more GPUs (some 58xx) by next month. Had to replace Corsair VX 550 because it broke after approx. 336h of continuous load of ~600W (all GPUs and Q9300 overclocked and overvolted). TX850 is fine now