graphics card - Motherboard doesn't recognize my second GPU - Super User
Why graphics cards can't be detected when I plugged them in the PCIe x1 slots in the second row of the motherboard TB360-BTC PRO or TB360-BTC PRO2.0 :: BIOSTAR FAQ
How to install a new graphics card | PCWorld
Matrox Guide to Different Types of Expansion Slots and Add-In Cards
ASUS Z690 ROG boards feature PCIe slot quick release feature
Can we insert a graphics card into a PCI slot? - Quora
Does it matter which pcie slot i put my graphics card in? | Tom's Hardware Forum
Which slot should I put my GPU in? Does a Graphics Card Have to Go in the First PCI-E Slot? - Quora
How To Check PCIe Version of Slot and Motherboard - YouTube