500W to 550W: 12 Power Supplies Compared

Comparison: Molex Cable Lengths

Most of the units have two or more cable harnesses for Molex connectors, with sufficient lengths for most users. The exception is the Arctic Cooling Fusion, which only has three Molex connectors on one cable harness. If you don't tend to use Molex connectors, that might be fine, although the single string of SATA connectors could still be a problem. Keep in mind that Molex connectors can also be important for connecting fans, unless you use a fan control unit. Obviously, Arctic Cooling decided to focus on providing more PCI-E connectors at the cost of SATA and Molex harnesses.

Both the Seasonic M12II and S12II along with Corsair's HX520 include three harnesses and eight Molex connectors -- nine on S12II. While we appreciate having extra connectors, eight or nine Molex connectors seems to be overkill. In fact, our custom PC Power & Cooling Turbo Cool 860 only has three Molex connectors, and we've been happily using it for quite some time.