What is a PCIe slot with an x4 slot and x16 connector?

PCIe Slot Characteristics - Oracle® Exadata X8-2 Database Server pcle slot You can install PCI Express slots in larger slots but not smaller ones For example, you can install a PCI Express x1 adapter into an x16 slot (but will pcle x1 slot PCIe slots on motherboards accommodate expansion cards, with slot sizes determining data transfer bandwidth For optimal

pcle slot The smallest PCIe slot will run at x1 speed, while a full-size PCIe slot will run at x16 PCIe x16 slots are generally intended for use with Graphics Cards