Hi I have built new pc Its Core i-3, 4 GB RAM,500 GB Toshiba HDD, 1 DVD-RW & Intel H61BF OEM board.No Graphics & other add on PCI-e cards. SMPS is very important factor for a healthy system. I have zeroed following Cooler Master Silent Pro Gold 550 Watt (80 Plus Gold) OR Cooler Master GX- II 550 Watt. (80 Plus Bronze) But I am in doubt about 80 plus certification. Silent Pro Gold has 42 A on 12 Volt rail & it consumes 504 Watt GX II has 44 A on 12 Volt rail & consumes 528 Watt. Means Silent pro Gold 550 Watt- 504 Watt = Wastage watt is 46 Watt & GX II 550 Watt - 528 = Wastage Watt is 22 Watt GXII has less wastage than Silent Gold My assumption is 80 Plus Gold should have less wastage of watt. & 80 Plus Bronze should have more wastage of watt. But here is reverse fact. How this is ? For which one I should go ? Any expert opinion ?