PCIEx16 drops to x 8 when M2 SSD is installed???

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pciex16 slot configuration Expansion Slots: 1 PCIe x16 + 2 PCIe x1 CIRCUIT MODULE, Riser for ISMB Support 1 PCIex16 slot; Support ATX, Micro-ATA platform 1U PCIex 16 Riser

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