08-01-2011, 06:18 PM
mattkime wrote:
this thread would indicate that it does - https://discussions.apple.com/thread/2728724?start=0&tstart=0
if it does and i have a simpler/older power supply, what happens?
Absolutely nothing so long as the UPS is rated for more than the maximum draw of the power supply from the computer and all of the other devices that are attached.
Otherwise you may have a brief dip in the power or break in the power or hear an overload alarm when you first boot the computer.
It has nothing to do with the "wave type." (No idea why spiff would bring that up in this context.) Devices with PFC are capable of suddenly kicking up to their maximum power draw when first powered on even though the ordinary demand on them is much less. So, a PFC PSU for a modern desktop tower computer that draws 240w during ordinary operation might pull 720w when you first flip the power switch. If your UPS can't handle the sudden demand then bad stuff can happen.
PFC is a non-issue so long as you follow the guideline of getting a UPS that's rated for at least twice the sum of the maximum draw of all the devices that will be attached to it. You're not likely to tax a BR1500 to the point where you'd ever see such a problem.