Hardware Secrets posted a review on the Seasonic Platinum Fanless 520 W Power Supply

The modular cabling system from this power supply has 10 connectors: two for the main motherboard power connector, four for video card and ATX12V/EPS12V connectors, and four for peripheral and SATA connectors. This power supply comes with the following cables:

Main motherboard cable with a 20/24-pin connector, 23.6” (60 cm) long
One cable with two ATX12V connectors that together form an EPS12V connector, 25.2” (64 cm) long
Two cables, each with one six/eight-pin connector for video cards, 23.6” (60 cm) long
One cable with four SATA power connectors, 15.7” (40 cm) to the first connector, 4.7” (12 cm) between connectors
One cable with two SATA power connectors, 11.8” (30 cm) to the first connector, 4.7” (12 cm) between connectors
One cable with three peripheral power connectors, 15.7” (40 cm) to the first connector, 4.7” (12 cm) between connectors
One cable with two peripheral power connectors, 11.8” (30 cm) to the first connector, 4.7” (12 cm) between connectors
One adapter to convert a standard peripheral power connector into a floppy disk drive power connector

All wires are 18 AWG, which is the minimum recommended gauge.

  Seasonic Platinum Fanless 520 W Power Supply Review