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enermax psu

The noisetaker. It's revered for it's quiet 120mm fan. Not that there aren't quieter power supplies out there, but that one is very quiet.
 
one of the big differences is the 12v rails. The "EG465AX-VE (W)FCA" has 35 amps on the 12v rail and the "EG475AX-VE-SFMA - Noisetaker" has 31 amps on the 12v rail but it's split up into two seperate 12v rails. One 12v rail being 16 amps and the second being 15 amps. I have no idea if having two seperate 12v rails of lower amps is better than 1 12v rail with higher amps though. Does anyone know? I think it's supposed to be better but I would imagine you would have to make sure you don't accidently put everything on the same 12v rail. funny thing is I was just looking at those same two power supply's the other day 🙂
 
Well, on the enermax supplies - 1 12V rail connects to the main 20 pin molex connector, and to the 4 pin square molex connector, which both connect to the motherboard.

This other 12 V rail provides power via the hard drive connectors.

The benefits of this are probably mostly in terms of manufacturing - you can use cheaper components in the PSU, and may be able to achieve better electrical efficiency, with lower heat production. There is a theoretical benefit in that power fluctuations caused by peripherals (e.g. drives spinning up) are kept seperate from the CPU, providing cleaner power.
 
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