Efficient PSUs run cooler and extra quietly and thus don't create as much noise which is vital for those who plan to sleep or suppose in the same room with it or use it as a media middle Pc.
24-pin motherboard connectors, etc. http://apickard.com/__media__/js/netsoltrademark.php?d=xn--L3ckrwb7aq9Dxa8GH9E.com