Can my PSU support gtx 580 SLI

[vafan13]

I currently have 1x GTX 580 but as I am about to pick up a 27" 2560x1440 monitor I'm thinking I might want a 2nd one. My only concern is can my PSU safely supply enough power. I know the AX850 is (or at least was) the best 850w PSU available but want to be sure before I plunk down the cash for another 580

[NKrader]

psu calc says around 600watts.. so im guessing your fine. it should work fine but id personally go 1kw+ but I like headroom for effecincy.

[ClockZ]

You are fine, I have been running heavy oc'd gtx480's for months on TX850 without any issues, and they are very power hungry when the voltage is cranked up.