Supermicro 2U PCI-E (x8) to 2x PCI-E (x4) Riser Card, For Right (RSC-R2UE-2E4R)
Amazon.com: ADT-LINK PCIe X8 to X8 Adapter Cable for Graphics Video Card PCI Express Extender PCIe X8 to PCIe X8 Slot Extension Cable for 1U 2U Server (80CM) : Electronics