2U 3*PCI-32bit/5V 33MHz single bus riser card. The gold fingers linked with the middle riser connector (MAIN) is connected to the motherboard PCI-32 slot-6. The top and bottom PCI-32 riser connectors (SHARE) linked with 2*8-wires paddle links are connected to the motherboard slot-5 and slot-4 PCI-32 slot.