ok this is what im working with...
as you can see i have no room for anything bigger, but i want one more card and will need at least a 1200w psu. i need to know if they vary in size because even 1/4 of an inch larger just will not work
Not all PSU's are the same size. You'll have to physically measure your PSU and compare it with given measurements on manufacturer's websites. The problem is that even though they may all be called "ATX" form factor, they still differ in size.
Just out of curiosity, what are you trying to run? That CM Silent Pro 1kW is an amazing PSU, and if it can't handle your build then I'm jealous...
Oh, and for the record, if you're looking for massive power you may want to look at the Corsair AX 1200, though it's a very long PSU and I don't think it will fit with ease. I wanted to ask you why you don't move the radiator to the top of that case when I noticed o hai thar, another radiator! Nice build man!
i need another 570 because what i have now doesnt cut it for 3 monitors. i didnt realize the dimentions were stated in the details, i guess i never looked.
thanks for finding that one. i read the review, but ill research it a bit more. just hope that sticker comes off or ill have to paint if i get that one.