Originally posted by: Beanie46
Originally posted by: Lunyone
You don't just add them up. If you look at the sticker closer you will notice that the Enhance supplies ~350w on the combined 12v rails (150w for 3.3v & 5v + ~3A on the 3vsb line = ~153w total). You take the 3.3v/5v/5vsb lines combined and subtract from the total wattage. So you get 500w (total) - ~153w (3.3v/5v/5vsb) = ~348w. Now you take the total watts on the 12v rail and divide by it by 12v = 348w/12v = ~29 amps. Most quality 500w PSU's usually have 34 amps on their rails, so this is why I threw up the flag on the Enhance PSU. See the Enhance PSU sticker below:
Psssttt......that's not how you determine max. combined output for the +12V rails, either. With Enhance, you've just about got to call them to get the combined +12V rail rating....Enhance doesn't publish them.
As for total combined +12V load capacity, since the model just below his, the Enhance ENP-5140GH, a
400W unit, has 28A available on its +12V rails combined, I think you're a tad off in your "calculations".
Well, in defense of what you said, it is true that if all the minor rails were full loaded simultaneously, then all that would be left to the +12V rails would be the 29A.....but that will probably never happen since modern rigs these days are +12V heavy and the minor rail draws are fairly insignificant. You'll never see the minor rails pulling their full rated capacity.....unless you're trying to power up a Pentium III computer.