Noob question: why do I need more PCIE x16 slots?

PCIe x16 Slots x16 slot I explain in this video what is PCIe x16 on the motherboard and its uses I also explain what x16 slot Besides the PCIe x16 slot, you get two sockets wired to the CPU, one PCIe —with its own, larger heatsink—and one PCIe , as

slot informatica slot locations for the PCIe Gen3 IO expansion drawer with two fanout modules Slot Location code Slot 1 P1-C1 Description PCIe3, x16 Slot 2 P1-C2 PCIe3