yeah..i want to upgrade to the msi 890fx-gd70 as soon as i can...then xfire 2 of these asus top 5850's...then ill be set..altho i will need to get a highr power psu of course..ok..ty guys..this place is awesome!
ok..ill look into that..i was thinking that for now..with a single card solution..it would be fine, however,..i agree that crossfire might take more...ty for your input, everyone here is so helpful and knowledgable....
According to AMD you need: 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode).
The CORSAIR CMPSU-650TX you have selected should be plenty powerful, however you will have to use adapter connectors, as it only has 2 x 6+2 pin power connectors, whereas the CORSAIR CMPSU-750TX has 4 x 6+2 pin power connectors.
However, the 750TX is at the same price as the Antec TruePower New TP-750 that calguyhunk linked, and from reviews looks like an excellent PSU.
So 600W and you have a total of 650? If your cutting it that close AND you don't have all the plugs you should have is why I say you should get a different one for CF. I wouldn't want to be gaming and running my PSU at 92% of what it can do for hours on end. That can't be healthy. Its not really this bad as the TDP of the 5850 is ~175W. Two in CF is 350W, toss in another 100W for your CPU and another 50W or so for everything else and your really looking at a draw of around 500W or so. Thats a lot better but if you don't have the plugs to do it I say don't.