What is PCIe? Understanding PCIe Slots, Cards and Lanes
PCIe slots are designed to be backwards compatible, meaning that a card with fewer lanes (like a 4x) can be used in a slot with more lanes (like a 16x).
Can I Fit Two Graphics Cards in My Motherboard? (Answered)
What Graphics Cards Are Compatible With My Motherboard – Complete Guide! ... Look for PCIe slots and match them with the graphics card’s interface.