How Many M 2 Slots Does ASUS Z390 Have?

ASUS Z390 has a total of 4 M.2 slots. Two are located on the right side of the motherboard and two are located on the left side. The two M.2 slots on the right side of the motherboard are placed underneath the SATA ports and support both SATA and NVMe drives.

2 slots on the left side of the motherboard are placed next to the PCIe slots and only support NVMe drives. All four M.2 slots support up to PCIe 3.0 x4 speeds.