PCIe x8 Gen3 Embedded Cable Adapter - One Stop Systems
PCIe x8 to x16 Extension Cable
NVMe M.2 SSD to PCIe X16/X8/X4 Card - Sabrent
PCIe Gen5 x8 to x16 Lane Reducer - Serial Cables
Flexible PCI Express X8 to X16 Riser Card [ST8026] - $8.99 : Sintech Eshop!, The World of PC Adapter Card
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
MAIWO M.2 expansion card KT058A NVMe SSD to PCIe 3.0 X16/X8/X4 adapter M Key Converter Card Support 2230 2242 2260 2280,Compatible with Windows 7/8/10 & Linux ,BTC accessories - Newegg.com
PCIE4.0 Split PCIE X16 to X8+X4+X4 Expansion Riser Card 2x .2 NVME Input Port - AliExpress
GPU Running with PCIe x8 instead of x16 help | TechPowerUp Forums