pcie x16 slot configuration
1U PCIe x16 1-slot Riser Card F1UL16RISER3
1U 1-slot PCIe riser card option One PCIe* add-in card slot – PCIe* x16, x16 mechanical.
Best motherboard for the Ryzen 7 7800X3D in 2024 - XDA
ASROCK limits the motherboard with two PCIe x16 slots (PCIe 5.0 x16 supporting up to x16 mode and PCIe 4.0 x16 slot supporting x4 mode) and one PCIe 3.0 x1 slot at the end.
GIGABYTE TRX50 AERO D sTR5, E-ATX Mainboard
Mainboard Asrock X670E PG Lightning | AM5 · CPU: - 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode* - 1 x PCIe 4.0 x16 Slot (PCIE3), supports x4 mode* · Chipset: