I will have to do the same ...changing 1 rig to win 7 then changing the accounts around some is how I feel I will do this just now However that is before I run the 775 ddr2-800 rig @3.3 vs the 1155 ddr3-2000 @4.8 test. I still have not put this on a Kill a Watt either but on that at least I am hopeful. I think I have 5 hd 5870's all ready to go...... Should be good to add 70K to my current 25K ppd... I have the slots.... and probably the psu's just need a few more cards if I can afford the power.

It will be the power use that determines if I need to sell these cards and buy newer faster better here