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The PCIEX4 slot will become unavailable when an SSD is installed in the M2B_SB connectors.
![gigabyte ultra durable motherboard intel 8 series gigabyte ultra durable motherboard intel 8 series](https://images.yaoota.com/N2QUtc9lJ3b9pBgqX1fL_u7gXR0=/trim/yaootaweb-production/media/crawledproductimages/bb2d59edd3820d7ee4fa5331c5365d6333095e7a.jpg)
* The M2B_SB connector shares bandwidth with the PCIEX4 slot.
#GIGABYTE ULTRA DURABLE MOTHERBOARD INTEL 8 SERIES PRO#
(148) GIGABYTE B550 AORUS PRO AC AM4 AMD B550 ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 2, Intel 802.11ac, 2.5 GbE LAN, PCIe 4.0