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Ultimate Scalibility: 4*PCIe 5.0 x16 slots for Multi-GPU and 4*PCIe 5.0 x4 M.2 slots. ... Hi-Fi Audio with DTS:X® Ultra：ALC4080+ALC897 CODEC.
PCIe 3.0 vs 4.0: What’s the Difference and Which Is Better - MiniTool ...
The first 16 PCI Express lanes will be used for a single x16 PCIe slot, or they can be split into two x8 slots. AMD's requirements only enforce PCIe 5.0 on the X670E boards, which means PCIe 4.0 will be applicable to lower cost motherboards.
Amazon.com: PCI-E to USB 3.0 7-Port(2X USB-C - 5X Type-A) Expansion ...
Two things you ought to consider: (1) using additional PCIe slots beyond the main x16 for your graphics card will likely take PCIe lanes away from other board ...