Why do the Z390 series motherboards have 24 PCI-E lanes when the 8/9th generation Intel CPU only have 16 PCI-E lanes? - Quora
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AMD's EPYC Rome CPUs could have double the PCIe lanes of the corresponding Intel chipset - NotebookCheck.net News
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PCOM-B703G, Intel® Xeon® processors D-2100 NT Skylake-D family, with 2x DDR4 ECC DIMM sockets, 32 PCIe Gen3 lanes rearrangable for different combination of PCIe x16/x8/x4/x2/x1.
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Xeon D-based SBC Features 16 PCIe Lanes to Alleviate Processing Bottlenecks - Military Embedded Systems
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