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Support for Alienware x17 R1 Storage says both slots take M.2 PCIe Gen4 x4 NVMe, up to 64 Gbps, Up to 2 TB. https://www.dell.com/support/manuals/en-uk/alienware-x17-r1-laptop/alienware-x17-r1-setup-and-specifications/storage?guid=guid-d79f17ca-e619-43e7-82a5-a0b0e7fb5c0a&lang=en-us
Sorry, there was a problem. Please try again later.The system comes with M.2 PCIe NVMe slots. This does not have PCIE 4.0.
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