Agreed. But with the requirement of 10 PCIe power connections per S7, cabling can be a challenge with the ATX approach.
I found a few options on Newegg when I did a power search yesterday - 3 platinum with enough connectors, but 2 of them were under 1100 watt (and flat out don't have enough +12 rail capasity), and a few Golds - the other was the Seasonic 1200watt platinum unit IIRC.
The one concern I would have on a few of these is "split connectors" on one cable if the cable isn't 16AWG or better.
Quite a few others like the EVGA 1300G2 and Seasonic X1250 that WOULD work if you're willing to risk the "use 2 connectors per hash board" option, or do some custom cable work to spread the load out, especially if you can use the EPS12V output and rewire the other end with a 6 pin connector instead of an 8 (perhaps use the left-over +12 and ground lines to wire a controller-specific connector to?).
I'm kinda leaning towards server PS for these though, $200 or so of Bladecenter H 2880 watt+breakout+cables will power 2 of these comfortably, and I'm easily capable of wiring up a 220 outlet to power it. I just want to find a cheaper source for NEMA 6 series outlets/plugs/cables than what I've seen so far.
This user also PM'd me begging for coupons...
