from the killawatt
807wattsnothing to brag about for 5 x 480s at 28.xx mhs
the newer GPUs like single 5700XT can do twice the hash at lower watts

Software still reporting a total of ~664?
Yeah, the 5700xt is basically a double card, lol. Now that I've learned a bit with the dozen Polaris cards I have, I have an appetite for more efficiency going forward.
SMOS still reports the same 664w
the mobo, ram, cpu etc takes about 142w
I will keep these 470s,480s aside and offline for now (i have total 240 + 60 of them)
All my 1080tis, 1070tis, Vegas are mining ETH for a while now
A few 1060 and P106-100 rigs are also just up and running.
When ETH goes parabolic, I will squeeze the melons out of the 470,480s - at that time electricty wont be hard to justify.