What is the PCIEX16 reading?

Expansion Slots: 1 PCIe x16 + 2 PCIe x1 CIRCUIT MODULE, Riser for ISMB Support 1 PCIex16 slot; Support ATX, Micro-ATA platform 1U PCIex 16 Riser

yes you should have no issues if you connect to your bottom slot on the board, however just make sure your CPU has plenty of PCI-E lanes so

pciex16 slot EZ-Latch：PCIe x16 Slot & Connectors with Quick Release & Screwless Design; Fast Networks： LAN & Wi-Fi 6E ; Extended Connectivity：HDMI

slot gacor malam hari Why does a PCIe slot which has only 4 lanes physically has 16-slot size? What difference does sharing secondary PCIe x16 with other PCIe lanes