Not to naysay, but beware of strange problems like hysteresis when working with 2 different inputs on your video card. I, and a couple others on overclock.net have tried dual PSUs in a system (mine was running the PEG connectors on it's own PSU) with mixed results. Mine did not work, some others...
I'm in the same boat actually... sort of scared of how mine's going to end up in Alaska, as I've been packing planes for 8 years now, and unless there's fragile stickers on it, we do not treat it kindly when we're trying to meet our timelines...
My "test suite" consists of
Guild Wars 2, max settings, supersampling on
Battlefield 4, ultra preset (haven't toyed with the settings a lot yet)
Mechwarrior Online, everything maxed, motion blur on high
Natural Selection 2, everything maxed, directX 11 (beta) activated
Man I love how my...
Just for some more stats for your guys' peace of mind, I have the asus maximus VI impact, intel i5-4670k, and a GTX 780ti with one ssd on the silverstone 450w SFG PSU, and I haven't seen anything over 335w yet, (at the wall) with the card at 85% usage. I imagine it'll go up as I play with it...