The Dell G15 5511 Gaming Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) or (2230) Solid State Drives) Note: The M.2 (2280) and (2230) Drives each use a unique thermal bracket and cannot be interchanged. The M.2 (2230) Drive uses thermal bracket p/n 0FJ75H and the M.2 (2280) Drive uses thermal bracket p/n 026X1Y. Both of the M.2 slots support M.2 (2280) and (2230) Drives by moving the drive mounting bracket p/n 0X8MY9 to accommodate the form factor. (M.2 slot 1 (SSD-1) supports Generation 4.0 x4 and 3.0 x4 NVMe performance and M.2 slot 2 (SSD-2) supports Generation 3.0 x4 NVMe performance only)