motherboard with two pcie x16 slots
ASUS WS C621E Sage EEB Server Motherboard Dual LGA ...
Two PCIe 4.0 slots on DIMM.2, two PCIe 5.0 x16 SafeSlots with PCIe Slot Q-Release Slim and full support for next-gen graphics cards. Two Thunderbolt™ 4 ports ...
Dell PowerEdge R620 (Xeon E5-2643v2 6 Core, 32GB RAM)
Up to 768GB (24 DIMM slots): 2GB/4GB/8GB/16GB/32GB DDR3 up to 1600MT/s. I/O slots. 3 PCIe slots: Two x16 slots with x16 bandwidth, half-height, half-length
Dell PowerEdge R620 (Xeon E5-2643v2 6 Core, 32GB RAM)
3 PCIe slots: Two x16 slots with x16 bandwidth, half-height, half-length; One ...
MSI MPG B550 Gaming Plus - The AMD B550 Motherboard Overview: ...
The MSI MPG B550 Gaming Plus includes two full-length PCIe slots with the top slot capable of supporting up to PCIe 4.0 x16, and the second slot is locked at PCIe 3.0 x4.