The Corsair HX520W is something of a veteran among power supplies ; the product has been on the market for quite some time now. This unit is a modular power supply with an output level of 520 watts.
The power supply has a 120 mm fan which is very quiet when running, even under high loads. Conventional cables permanently affixed to the power supply are used for both the CPU supply and the ATX connections.
The labeling of the power supply on the rear is very informative, allowing you to determine the characteristics of the supply without needing to open up the case. Other manufacturers should take a page from Corsair here.