What are the top uses of PCIe x1 Slots?

Implementing an IBM High-Performance Computing Solution on IBM pci e slot - the two slots circled in blue are what ya gpugpu's will be connected inplugged in pciex1_1 slot Well-known member looking at your image the GPU is not even fully into the slot at all its sat with all the PCI-E Card Edge out the slot

pcie 4 ssd in pcie 3 slot You need to find a motherboard with built-in PCIE switch which automatically increase the price by a good margin See the MSi MEG X570S