Summary: I researched well before buying this unit and thought I had hit the right compromise between price and quality. When I powered the unit up, the fan blades hit a wiring bundle visible inside the unit. I cold have pushed them down and probably been OK but why? Especially with the sticker that says "checked by" on it. Anyway, RMA back to new egg and bought a unit that cost twice as much but worked as advertised.
Cons: Unit was DOA; fan blade was hitting bundle of internal wiring. Poor QC
Pros: I moved into a new apartment where the power flicks off and on sometimes. I was planning on getting a UPS battery backup to prevent my computer from turning off, but this PSU performs this function on it's own! My monitor, router, and everything else electric shut off, but the computer stayed on! These are just short flickers I'm talking about though. Less than a second.
Cons: 750w... right from the start going TICK TICK TICK... the fan is out of tolerance with the shroud, and one fin makes contact with the edge once every rotation. it's very loud... where's the Quality Control on a $120 power supply??!?! Antec just lost a long time customer
Summary: My rig draws 856W from the wall under full load (prime95+ furmark 1080p fsaa 4x). Tested for one hour, No problems whatsoever. 856w from the wall means less than 787 "real" watts (12V +3V+ 5V rails. Up to 92% efficiency). Should be fine. It's got two 12v rails rated at 35A each (744W total). Additional 100W for 5V and 3.3V.
Pros: Stays cool all the time. If you wanna install it upside down (the fan facing down. Makes cable management so much easier), make sure there are vents underneath the PSU. Got it for 60 after rebate. What a steal! 2 Powercolor 290Xs crossfired- no problems so far. It's quiet. No coil whining. No discernible noise from the fan 3 PCIe lines (don't try to power up 3 gpus though) Basically it's a re-branded SeaSonic PSU
Cons: Since it's clearly stated in the description the PSU is not modular... Very poor boxing (considering the price i'm OK with that) Should anything happen to the PSU, I'll update the review.