500W to 550W: 12 Power Supplies Compared

Comparison: PCI-E Cable Lengths

A 500W power supply is more than capable of running multiple graphics cards. The primary limitation in most cases will be the number of PCI-E connectors. Some of the power supplies only include two PCI-E connectors to be "safe", which is still sufficient for a decent high-end graphics card provided you don't need an 8-pin PEG connector.

Oddly enough, considering their lack of an 8-pin ATX connector, Arctic Cooling is the only company to provide four PCI-E connectors. The other companies include either one 6-pin and one 6/8-pin PEG, or in the case of Corsair two 6-pin PEG connectors. Again, these power supplies should be more than capable of running multiple high-end graphics cards, but the manufacturers have limited things so that you won't inadvertently pressure power supply too far.

In terms of cable lengths, we can see greater variation than last time. The Sunbeam Tuniq is on the short end of the list, starting at 35 cm, and the Tagan SuperRock provides a maximum length of 65 cm.