The Asus M7601RM Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) Solid State Drives) Note: The primary M.2 Slot-1 (SSD1) supports PCIe NVMe Generation 4.0 x4 and 3.0 x4 Solid State Drives and the secondary M.2 SSD-2 Slot (SSD2) supports PCIe NVMe Generation 3.0 x4 Solid State Drives.