Guys I was thinking the same thing both are good. I have a silverstone zeus 650 watt that is runnign good for many many years. My doubt was the rails. Silverstone only has single rails now,The enermax has 4 like my old silverstone. I am doing a slow build up, Thinking Rampage iv with 64 gig memory and extreme processor. I was reading allot and many debates on single versies multiple rails for safety protection of parts. Both have same dimensions. Its a 50.00 difference but the silverstone raven 3 case i got for this build of course recommends silverstone power supplies.