Phanteks PH-CBRS_FL15 150mm Flat Line PCI-E x16 Riser Cable 90o Adapter for the Enthoo 719 - Newegg.com
There's a PROBLEM with Riser Cables - Hardware Canucks
LIAN LI LAN2-1X Premium PCI-E x16 3.0 Black Extender Riser Cable 200mm and Covert Bracket for LANCOOL II / LANCOOL 2 / LANCOOL TWO ---LAN2-1X - Newegg.com
Riser PCI E 3.0 X16 To 16X GPU Graphics Card Extension Cable for X99 Server Motherboard RTX3060 RTX 3060ti 3060 ETH Mining Miner|Computer Cables & Connectors| - AliExpress
Bitspower VGA Vertical Support with PCI-E 4.0 Riser Cable BP-VTS-PCIE4