Amazon.com: JXSZ PCI-Express 8X to 16X Riser Adapter for 1u/2u PCI-E x8 to x16 Left-Facing 90-Degree Right-Angle Card : Electronics
iStarUSA One PCIe x16 and Two PCIe x8 Riser Card DD-643655-C7
PCIe Gen 4 vs. Gen 3 Slots, Speeds
PCIEX16E-844S | PCIe x16 edge connector to one PCIe x8 and two PCIe x4 Slots riser cable | x16 to x8 and x4 PCIe bifurcation riser cable | PCIEX16E-844S