PCIE HBA and PCIE GbE Card in single x8 Slot using splitter

16 GPUs MINING on 1x PCIE x16 SLOT!!! pcie slot splitter 1to 4 PCI-E Splitter Adapter 1 Turn 4 PCI-Express Slot 1x to 16x USB Special Riser Card PCIe Converter, You can get more details about 1to 4 PCI-E pcie slot cover Allows to plug in up to three GPUs into one motherboard PCIe slot; Splits upstream x1 x4 x8 x16 PCI Express bus into up to 3 downstream x16 PCI

pciex4 slot you can put raid cards in 4x slots, some times you have to mod the 4x slot so the back is open Alienware M17x-R4