On Thu, 27 Nov 2014 13:27:06 -0500 Michael Powell wrote: > Almost all modern desktop power supplies today are active PFC, so the > pure sine-wave is becoming a 'must-have'. That's rather annoying for domestic desktops where PFC benefits the power company rather than the bill payer. I'm surprised someone isn't marketing a non-corrected PSU as "UPS optimized".