The Dell XPS 17 9700 Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) or (2230) Solid State Drives) Note: The M.2 (2280) Solid State Drive has a unique thermal bracket and cannot be interchanged with the (2230) Solid State Drive thermal bracket. If installing a M.2 (2280) Drive in slot 1 (SSD-1), you will need the M.2 Drive thermal cooling bracket p/n HFD3T for installation. If installing a M.2 (2280) Drive in slot 2 (SSD-2), you will need the M.2 Drive thermal cooling bracket p/n JFF2T for installation. (Both M.2 slots support Generation 3.0 x4 PCIe NVMe Solid State Drives)