The problems with the 530 watt version of the Enermax power supplies has nothing to do with total output. Normally, that would be plenty of power. The unit itself has glitches. That's why I've never used it, or offered it.
Now, supposedly, Enermax is going to (or has) ironed out the kinks in the unit but, until I see some evidence of that, it will not be gracing my shelves.
The 350's (older model), 365's and 450's (older model), 465's have all been essentially problem free and are fine for the faster TBirds.
Russ, NCNE