Recently built my computer, I'll list a few of the components just as a general reference in what I have running in this comp.
CPU - intel i7 2600k
GPU - EVGA GTX 570 SC
HDD - 1tb 7200 RPM
PSU - XFX Black Edition 750W
I have two drives, a DVD-ROM and a DVD/CD WRITER.
I'm wanting to run SLI, basically just making sure this 750w PSU will run two GTX 570's + all of my other components. I don't plan on OCing.
I asked this question over in the Graphics Card section, someone told me it "should" be able to run it. I guess I'm just looking for more of a definite yes or no, upgrading power supplies isn't a big deal, but no need in doing it if it isn't needed.
Some psu's are much better then others, you happen to have a good one.
I would try it out since your other components(1155 platform)aren't power hungry.
If you have performance issues when gaming then you know you require an 850W unit.