first rig 4x4870s (was old gaming rig) current gaming rig and main bitcoin mining rig 2x5870s pushing out 720MH/s (no overclock just very fine tuning with GUIminer) and my new dedicated mining rig currently sit in the corner with its 6870 running away at just under 290MH/s iv also had a little computer inbetween the rigs with a 6570 low profile running at about 70MH/s

overall if you want anything to do with mining its got to be a ATI card anything after ATI my