pci expansion slots
Amazon.com: ASUS Pro WS W790 SAGE SE Intel LGA 4677 CEB Motherboard ...
The CPU is wired to two DDR4 DIMM slots, supporting up to 32 GB of dual-channel DDR4 memory; and the board's lone expansion slot, a PCI-Express 3.0 x16.
Expansion cards and slots | PPTX - SlideShare
Typical general expansion slots use either the peripheral component interconnect standard or the PCI Express standard.
MIC-75M11: 2-slot expansion i-Module with 1 x PCIe x16, 1 x PCI - BKAII - Thiết bị truyền thông tốt nhất với giá cạnh tranh nhất
MIC-75M11: 2-slot expansion i-Module with 1 x PCIe x16, 1 x PCI