How to increase the number of PCIe slots available?

Explaining PCIe Slots pcie x16 expansion slot Slot power ; x1 cards are limited to A at +12 V and 10 W combined ; x4 and wider cards are limited to A at +12 V and 25 W combined ; A full- pcie slot length The biggest and best PCI Express slot is the PCI Express x16 slot Pretty much the only thing that uses x16 slots outside of graphics cards is server-grade

pcie x 16 slot *Refer to com or this user manual for the Memory QVL Expansion Slots, 4 x PCIe x16 , support x16; x16x16; x16x8x8 and