USB2 hub, total of 5V 18A provided by three high-efficient 6A regulators powered by 12VDC. Ports are marked by group - 1,2,5; 3,4; 6,7

Accessible 12V pin header on the side for hooking up a 12V cooling fan. Port 1 can also be used to power USB fans with sticks in ports 2-7. This arrangement is optimal since heatsinks would face the rear (cables end) of the hub, with blinky lights visible at the front.

12V power can come from a relatively standard 2.1/5.5mm barrel jack or a PCIe 6-pin.

With this hub and a suitable 12VDC power source and fan it's possible to run six NewPacs at 600MHz each for 800GH total.

Let me know if you want one. Or two. Or a bunch, that'd be cool too.