Soldato
If you have the evga supernova I'd use that - I have basically the same PSU - superflower leadex 750 gold - I've never heard the fan spin up in that once in 3 years (it's passive till about 550w); powers my 64 nitro and X99 system nicely. You want some headroom with the vegas.
ok cheers, i will swap over the PSU whilst ive got the bonnet up