Perhaps use open-ended PCIe x1 slots instead of PCIe x16 slots? #9

PCI Express X16 vs X8 vs X4 vs X1 Slot: Difference, Use pcie x1 in x16 slot Install a low profile video card into a system with only a x1 PCIe slot • Install x4 or larger PCIe cards into a system with only x1 PCIe slots available pcie 3 slot Yes any pcie xanything card will work in a x16 slot, i have a pcie x1 asus xonar stx in a 16x slot right now x4 and x8 cards will also work in

pciex16 slot A lot of budget motherboards, having a x16x8x4 and 3x x1 slots, actually don't handle over 4 GPUs Even if you somehow could run the first GPU