User manual MSI B450M MORTAR (English - 91 pages) - manua.ls
M2_1: M.2 Slot (Key M) ... 3. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.4. Secure the M.2 SSD in place with the supplied M.2 screw.
Which motherboards are compatible with PCIe Gen.5 M.2 SSDs? | CORSAIR
Looking to put together a build with a PCIe 5.0 M.2 SSD? Here's a list of compatible motherboards.
Question - Motherboard with two PCIe 4.0 NVMe M.2 slots connected ...
The CVN B760 motherboards also come with Wi-Fi 6, three PCIe 4.0 M.2 slots for the CVN B760M FROZEN WIFI D5 and two PCIe 4.0 M.2 slots for the CVN B760I FROZEN WIFI mini-ITX motherboard.
M.2 - Wikipedia
Traditional motherboards designs were limited in how many M.2 slots they could provide due to two elements: available PCIe lanes and power restrictions.