What's the use of a 2nd PCI-E x16 slot ?

This topic describes how to use the PCIE x16 slot？ pcle x16 slot Graphics Cards · 5770 supports PCI Express up to x16 · Radeon RX 550 supports PCI Express up to x16 · PCI Express x16 is PCI Express pcle slot List of Motherboards with 3 PCI-Express x16 Slots: GIGABYTE B650 Gaming X AX V2, MSI X670E Gaming Plus WiFi, ASUS ROG Strix Z790-E Gaming WiFi II,

pcle x16 slot Replies A PCIe x16 slot is a video card slot which actually has nothing to do with your system memory However