What does PCIe-x16 really mean and how many do I need?

What does PCIe-x16 really mean and how many do I need? pcie x16 expansion slot PCIe x16: This is the largest PCIe slot with 16 data lanes PCIe x16 slots expansion card that connects to a computer's motherboard using a PCIe slot pcie x32 slot PCIe compatibility and performance generates a LOT of confusion In Explaining PCIe Slots

pcie x32 slot x1, x2, x4, x8, x16, and x32 A PCIe card will fit into a slot of its size or bigger, but not into a smaller PCIe slot The number of lanes actually connected

pcie 8x slot x16 The smallest slots are used by low-demanding cards whereas the larger x16 slot is x16 The smallest slots are used by low-demanding cards whereas the larger x16 slot is