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A PCIe x1 connector has 36 pins (18 pins on each side)
A PCIe x4 connector has 64 pins (32 pins on each side)
A PCIe x8 connector has 98 pins (49 pins on each side)
A PCIe x16 connector has 164 pins (82 pins on each side)
A PCIe x24 connector has 230 pins (115 pins on each side)
Source: Samtec catalog, Amphenol datasheet (x24)