Number of PCI Express slots

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How many PCI Express slots are there?

Generally 16 slots

Not too many people know that PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe, is a high-speed serial computer expansion bus standard designed to replace the older PCI, PCI-X, and AGP bus standards.  Needless to say, physical PCI Express slots may contain from one to thirty-two lanes, in powers of two (1, 2, 4, 8, 16 and 32).  It is extremely important to know that PCI Express operates in consumer, server, and industrial applications.

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