The Asus B9400CEAV Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) Solid State Drives) Note: Both M.2 slots support Generation 3.0 x4 PCIe Solid State Drives and can be set up as RAID 0/1 Drives. If installing a Generation 4.0 x4 PCIe Solid State Drive, the drive will run at Generation 3.0 x4 speeds.