I bought this computer from futureshop a couple weeks ago and had them put in a better supply and video card (as to not void my warranty - not because I couldn't do it myself). The guy suggested I use one of their own brand 'dynex 520'. I inquired a few times about whether or not it was quality, and enough to handle a gtx 560. He said it was. After doing some research I'm not so sure if I should trust it. here's some specs I found online My box says the same except conveniently leaves out the part about "max watt," just showing peak power as 520W. Also the second 12v rail says 16A not 18A. My computer has a i5 2320, 8gb ram, gtx 560, dvd drive and 1TB HD. Will the power supply to handle this? I have 9 days left to return, but that would require purchasing one somewhere else and dragging my computer all the way across town for futureshop to install it for me (as to not void my warranty) and give me a store credit. EDIT: this is exactly what my box says except with the "max watt 420", what does that mean? is it a 520 or 420 watt power supply?