PCI x16 running significantly slow!! Help!!

What is PCIe x16 pcie slot x16 List of Motherboards with 4 PCI-Express x16 Slots: ASUS Pro WS TRX50-SAGE WIFI, GIGABYTE A620M C, GIGABYTE B650M C V2, ASUS Prime B760M-A AX, GIGABYTE B760M pcie slot qrelease To Install a PCIe2 x16 Card Note – See PCIe and PCI Expansion Slots for PCIe slot locations and specifications Power off the workstation using the

pciex1 slot I have 2 x16 pcie and 4 x1 slots I have 2 x8 cards in the x16 slots, but need basic display adapter functionality for debian xfce