in theory you can run as many gpus as chipset allows you due to the number of pcie lanes.
good idea. yes i´ll try. if it doesnt work i use the 4x in the gaming rig
that particular mining machine has a Biostar motherboard with amd chipset. I couldnt find any technical spec (even @amd) featuring the number of pcie lanes, so i´ll give it a try. hash rate wise even underclocked (CPU) and set for low-power everything is according to forum findings and expectations here even on the pci-e splitter (pci-e expander) so far.
of course id like to have it run in an 8 card config if it supports it without replacing mobo,cpu and ram as while its cheap its still something to have to get ROI again
dstm equihash ~500 sol and ~4.6 sol/w @ +200core, +700mem, 110w (60% tdp) per GPU