Here is where 90% of builders make their mistake. Just because a slot is physically the length of x16 doesn’t mean it has electrical x16 wiring.
: With eight lanes, this slot provides even more bandwidth. It's often used for high-performance SSDs, RAID controllers, and lower-end graphics cards. pcie slot width
The electrical width refers directly to the link width, which signifies how many bidirectional data lanes connect the motherboard slot directly to the CPU or chipset. Each lane consists of two pairs of wires: one pair to transmit data and one pair to receive. The Core Form Factors What is PCIe? Understanding PCIe Slots, Cards and Lanes Here is where 90% of builders make their mistake