I believe that's what I have. A 500w powmax. The core is Leadman. They market it as a Powmax. The fan is a straight blow through, unlike the Enermax, which pull a certain amount of air directly off the cpu hsf. The layout is called nATX, or something like that. If you don't have any other fans in your case, or are missing a blowhole above the psu, then it might make a difference aircooling. Psu's are made to take some heat.
Anyway, mine does good with a 1.4g a7v133. With power to spare (heh).
$74 with s/h.
Rich is the nation that has many war heroes. Long since forgotten...