How Many M 2 Slots Does the MSI Z490 a Pro Have?

The MSI Z490A PRO has a total of four M.2 slots. Two are located on the front of the motherboard and two are located on the back. The front slots are placed underneath the chipset heatsink and are both compatible with PCIe 3.0 x4 and SATA 3.0 devices.

The back slots are placed next to the CPU socket and are only compatible with PCIe 3.0 x4 devices. Both sets of M.2 slots support up to 110mm long devices.