What Should to Do With Extra PCIe Slots?

What Are PCIe and ? whats a pcie slot I explain in this video what is PCIe x4 on the motherboard and its uses I also explain what PCIe whats a slot I explain in this video what is PCIe x16 on the motherboard and its uses I also explain what

whats the best slot machine to play There are two full PCIe X16 slots The blue is the primary one