[NUC] Which M.2 Slots on the NUC 11 Extreme Kit – NUC11BTMi7 Will Drop the Graphics Card from x16 to x8 Mode?
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Based on the Technical Product Specifications, the PCIe 4.0 x16 slot will run in x8 mode if the M.2 x4 slot, PCIe x4 slot, or both are used from the internal chassis baseboard, as these will share the bandwidth.
Refer to Figure 9. BBMC1B1 Baseboard Connectors and Figure 10. NUC 11 Extreme Baseboard M.2 location in the TPS