What a dumbass...sorta kinda...
Time Warner Oceanic gave me a new modem a couple of days ago. Turns out it's set to 192.168.0.xxx. My router is 192.168.1.xxx.
So...I finally figure that out and just plug the damn RPi into one of the modem's RJ45s, go direct to the 721, and set it to my home network's IP plan.
Now...if I can get the damn Internet to quit dropping out every ten minutes...
Wotta day. Macheen workee, though...same noise level as the A6 under it.
For the PSU question...I'm using the configuration I used for the S7s. They're (120/240) server bricks, rackmount, 1KW each. I've got gridseed adapters with four each, six-pin PCIe leads on each brick, and then that brick feeds one side of the A7. This way no brick is having to push more than 60%, and with these higher quality plugs I'm thinking it would be hard to fry an A7 if you're using the full config. IMHO I would NOT use anything but full, 3-pair plugs...and all eight of them.
So...up and running, I'm now...