Cooler Master Accessory: Universal Vertical Graphics Card Holder Kit V2 (PCIe 4.0) - For Full Tower / Standard ATX Chassis with at least 7 available PCI slots - Newegg.com
4090 vertically mounted with Cooler Master v3 holder in my O11D Dynamic : r/lianli
Amazon.com: Cooler Master Vertical GPU Holder Kit V3, for E-ATX/ATX/mATX PC Case & PCI-E 4.0 Devices, Adjustable Modular Video Card Support, Thick SGCC Steel Bracket, 165 mm Riser Cable Included - Black :