one of my 7 rig's , 1500kh :

home made risers with "activate 1x" hotplug bridge, and additional power molex



box with cutout hole and dual hp 800w server PSU modules joined and atx-converted , home made cables



dual old p4 coolers to mach gpu0 and gpu1 temps



home made 2x 2.5mm^2 cables



psu's



risers mounted