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Delock Products 89045 Delock PCI Express x8 Card to 2 x internal NVMe M.2 Key M - Bifurcation - Low Profile Form Factor
![2U riser with 2 x 64-bit + One PCI-Express x 16 slots with RIBBON PCI-64_Express_Ribbon PCI-64_Express_Ribbon (PLinkUSA.com / RackBuy.com) 2U riser with 2 x 64-bit + One PCI-Express x 16 slots with RIBBON PCI-64_Express_Ribbon PCI-64_Express_Ribbon (PLinkUSA.com / RackBuy.com)](http://www.plinkusa.net/products/PCI-64_Express_Ribbon.jpg)
2U riser with 2 x 64-bit + One PCI-Express x 16 slots with RIBBON PCI-64_Express_Ribbon PCI-64_Express_Ribbon (PLinkUSA.com / RackBuy.com)
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Why is the PCI Express port on the motherboard different in size? What does x16, x8, x4 and x1 mean?
![SUPERMICRO MB 2xLGA3647, iC621, 12x DDR4 ECC, 14xSATA3, 1xM.2, PCI-E 3.0/1,1,1(x32,x16,AOM),2x LAN,IPMI, WIO | smicro.eu SUPERMICRO MB 2xLGA3647, iC621, 12x DDR4 ECC, 14xSATA3, 1xM.2, PCI-E 3.0/1,1,1(x32,x16,AOM),2x LAN,IPMI, WIO | smicro.eu](https://smicro.cz/attachments/supermicro-mb-2xlga3647-ic621-12x-ddr4-ecc-14xsata3-1xm-2-pci-e-3-0-1-1-1-x32-x16-aom-2x-lan-ipmi-wio.jpeg?width=500&height=500)