Ok so is this thing really that quiet or is it just a gimmick? I had a rosewill 550w that was dead quiet, but with this new psu I am hearing a low groan that gets worse or better depending on the angle you are listening from. I already RMA'd once with OCZ and I am trying to decide if I should again. Also do you guys think my old rosewill 550w (2 12v rails @ 18A a piece) could power a single 8800 GTX? I only have one optical drive, a hard drive, 2 80mm and 1 120mm fan, and a cpu cooler.