I only use SC versions so I don't use PCI splitters and always use 6+ vga connection power supplies. Like EVGA 1300 or 1600 (has 9) I have 84 1070Ti inbound for tomorrow WOOT.
I'm old school, I dont like server power supplies but I get it. It's just not my preference.
I'll post a pic of my builds soon. Also just finished making a custom 7 card rack mountable case. (Had it designed then produced in China)
I have about 120 of the panda like miners and 80 of my frame build (like what you bought) but I made myself. I will be converting all my 6 cards to 7 cards though for space use and all will be racks when I am done.
Here's a pic of my rack case with 1600 EVGA T2 and 7 x 1080 Ti
= 4900-5000 SOL