What exactly is a PCI Express card slot (physical link width x16

Building a Multi-GPU Deep Learning Machine on a budget gpu slot width Max GPU Length Max Resolution Memory Interface Memory Size Memory Type Multi-Monitor Support Recommended PSU Wattage SLI Support Slot Width Stream gpu slot width So a regular reference-height GPU , with power connectors and bracket, requires a minimum of about 147mm That doesn't

gpu stuck in pcie slot I cannot find any specifications on the width of the GPU I can fit into a tower 100 3 slot? 4 slot? I would love to build one with a 4090