I'm looking to build a new i5-2500k system and would like to re-use my PSU if at all possible. It is a Corsair HX620W, one of the first PSU's made by Corsair. I'm only unsure about my GPU choice which is a GTX 570. According to the info I could find the GTX 570 requires a 550-watt power supply with a minimum of 38 amps on the +12 volt rail. The documentation for the HX620W says it provides a combined 50A on triple +12V rails. I have 2 x 6 pin pci-e connectors so I know I have the cabling but my concern is with +12V rails (triple vs single). So can this PSU safely run (1) GTX 570 or do I need to upgrade? Thanks in advance.
Actually, newegg puts it at 18 amps on one rail. I don't really understand what that means; for all I know, the card may draw from all three somehow. However, an insufficient power supply won't damage your system. At worst, it'll crash a few times and you'll have to get another.