How to identify what slot type a particular PC card is?

This video explains everything you need to know about PCIe slots, including PCIe slot USB

Many People Put This In The Wrong GPU Slot !!

gpu stuck in pcie slot Many People Put This In The Wrong GPU Slot !!

gpu slot width Industrial Motherboards & Slot SBC · Intelligent Transportation Systems SKY-MXM-A4500 New MXM Type B+ NVIDIA® Quadro® Embedded A4500 with DP