MSI Z590 Pro WiFi M.2 Slots: Free Specs List 2026

The MSI Z590 Pro WiFi motherboard offers reliable M.2 slots for Intel 11th/12th Gen CPUs, updated for 2026 compatibility. This budget-friendly board provides three M.2 slots with PCIe 4.0 support, perfect for gamers adding fast storage without premium costs.

Primary M.2 Slot (M2_1)

CPU-direct PCIe 4.0 x4 slot with heatsink. Supports up to 110mm drives, ideal for OS boot.
  • PCIe 4.0 x4 speeds to 7GB/s
  • Included shield heatsink
  • 2280/2260 sizes

Secondary M.2 Slot (M2_2)

Chipset-linked PCIe 4.0 x4. Shares lanes with SATA ports; disable if needed for full speed.
  • Up to PCIe 4.0 x4
  • No heatsink (add aftermarket)
  • NVMe only

Third M.2 Slot (M2_3)

PCIe 3.0 x4 via chipset. Great for secondary storage like games library.
  • PCIe 3.0 x4 (3.5GB/s)
  • Supports 2280 drives
  • Bottom PCB location

M.2 Heatsink and Cooling

Robust aluminum heatsink on main slot prevents throttling. 2026 BIOS optimizes thermal profiles.
  • Pre-installed on M2_1
  • Thermal pads included
  • Easy removal for upgrades

BIOS Configuration Tips

Access M.2 settings in OC menu. Enable Resizable BAR for PCIe boosts. Update to latest 2026 firmware.
  • PCIe mode selection
  • Lane sharing warnings
  • Above 4G decoding

Compatible SSDs List

Works with Samsung 990 Pro, WD Black SN850X, Crucial T700. Backward compatible.
  • Gen4 NVMe SSDs recommended
  • Gen5 with bifurcation
  • RAID 0/1/5/10 support

Frequently Asked Questions

How many free M.2 slots on MSI Z590 Pro WiFi?

Three M.2 slots: one PCIe 4.0 x4 (CPU), two chipset (4.0/3.0). All NVMe-ready in 2026.

Does M.2_1 share bandwidth?

No, direct CPU lanes ensure full PCIe 4.0 x4 speeds without sharing.

Are heatsinks on all slots?

Only M2_1 has factory heatsink; others need aftermarket for high-TDP drives.

2026 BIOS M.2 updates?

Latest BIOS adds Gen5 preview support and better lane allocation.

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