pcie x8 in x4 slot: motherboard - Is PCI Express x4 faster or slower than a standard ... . Mainboard PRIME H610M2 FPT – Synnex FPT. Can PCIe X4 Card Fit in X16 Slot? - Can it Work? - PC Guide 101. What is PCIe x1 slot used for? - stc-cable.com.
The common PCI Express
slots we see on motherboards are PCIe x1, PCIe x4, PCIe x8, and PCIe x16.
PCI_E1
slot will run at x8 speed and PCI_E2 slot will run at x4 speed when installing PCIe Gen 5 M.2 device in M2_6 slot.