Single Slot GPUs Video Graphics Cards

Link Width x8 vs x16??? gpu slot width Standard Graphics Card Dimensions Length Height Width 2-Slot Thermal and Power Specs Maximum GPU Temperature 94 Maximum Graphics gpu blocking pcie slot So if a graphics card has a width of 40mm, is it literally touching the next graphics card? Or is there a small tiny space for that GPU to

gpu stuck in pcie slot PCI Express slots on the motherboard can be wider then the number of lanes connected For example a motherboard can have x8 slot with only x1