2U PCI/PCI-E combo riser card, 2*PCI-X 64bit/3.3V +1*PCIe x8 on slot-6.
The middle PCIe x8 riser connector linked with the goldfingers is connected to the motherboard PCIe x8 slot-6, an completely indepedent PCI-Express connection.
The top PCIX-64 riser connector (main) linked with array-pins is connected to the motherboard PCIX-64 slot-5, another completely independent PCI-X connection.
The bottom PCIX-64 riser connector (share) linked w/a 8-wires paddle link is connected to the nearby PCIX-64 slot-4.
For expansion of PCIe x8 on motherboard slot-6 and 2*PCIX-64 connection on slot-5 and slot-4(same PCI-X 66/100MHz buses), such as Intel SE7221BK1-E.