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Description
Design a sleek, small, custom-build PC with the MAG B550M MORTAR AM4 Micro-ATX Motherboard from MSI. Ideal for the builder who wants to focus on gaming components, this mini-ITX form factor motherboard offers the utility of larger boards in a smaller package. Take advantage of fan- or liquid-cooling systems, wired gigabit connectivity, and RGB headers for a unique and colorful style.
An AM4 socket and B550 chipset provide compatibility with various AMD Ryzen-brand processors. Four dual-channel DDR4 memory slots are available, as well as six SATA III ports and two M.2 slots for storage devices. One PCIe 4.0/3.0 x16, one PCIe 3.0 x16, and two PCIe 3.0 x1 slots are available for the installation of a graphics and utility cards. This motherboard is only compatible with Windows 10 (64-bit) operating systems.
Additional information
| Weight | 3.23 lbs |
|---|---|
| Dimensions | 11.3 × 10.8 × 3.2 in |
| Chipset | AMD B550 |
| U.2 | None |
| Supported Operating Systems | Windows 10 (64-Bit) |
| Audio Codec | Realtek 1200 (7.1-Channel) |
| I/O Connection Headers | USB 3.1 / USB 3.2 Gen 1 |
| Diagnostics | Clear CMOS |
| LED Header | 3 x RGB |
| Security | Chassis Intrusion, TPM Module |
| Power Connectors | 1 x 24-Pin Mainboard<br />1 x 8-Pin ATX |
| Liquid Cooling | 1 x 4-Pin Pump |
| Air Cooling | 1 x 4-Pin CPU<br />3 x 4-Pin System |
| Multi-GPU Support | 2-Way AMD CrossFireX |
| Expansion Slots | 1 x PCIe 4.0 x16<br />1 x PCIe 3.0 x16<br />2 x PCIe 3.0 x1 |
| RAID Support | RAID 0, 1, 10 (SATA)<br />RAID 0, 1 (M.2) |
| M.2 | 1 x M Key 2242, 2260, 2280, 22110 (PCIe 4.0 x4, PCIe 3.0 x4)<br />1 x M Key 2242, 2260, 2280 (PCIe 3.0 x4) |
| CPU Socket | AM4 |
| SATA | 6 x SATA III |
| ECC Support | Non-ECC, ECC Unbuffered |
| Channel Architecture | Dual Channel |
| Maximum Capacity | 128 GB |
| Memory Support | DDR4 1866, 2133, 2400, 2666, 2933, 3000, 3200, 3300, 3333, 3400, 3466, 3600, 3733, 3866, 4000, 4133, 4200, 4266, 4300, 4400 MHz |
| Memory Slots | 4 x 288-Pin |
| Buttons | BIOS Flashback |
| PS/2 | 1 x Combo |
| Ethernet / Controller | 1 x 2.5Gigabit |
| Display | 1 x DisplayPort <br />1 x HDMI |
| Thunderbolt | None |
| USB | 1 x USB 3.1 / USB 3.2 Gen 1 Header (Supports 1 USB Type-C Port)<br />1 x USB 3.1 / USB 3.2 Gen 1 Header (Supports 2 USB Type-A Port)<br />2 x USB 2.0 Header (Supports 4 USB Type-A Port) |
| Form Factor | Micro-ATX |
Reviews (8)
8 reviews for MSI MAG B550M MORTAR AM4 Micro-ATX Motherboard
Only logged in customers who have purchased this product may leave a review.
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Matilde Hagenes
Verified Purchase
Bought this board for my daughter’s build. Be aware that you may need to update bios to see ryzen 3 chips, but don’t worry, it’s super simple.
Lucious Swift
Verified Purchase
MSI makes great products. This is definitely one of the best B550 boards available. The fit and finish for this board is super nice. Great for the long term. Now all I’ll have to do in the future is upgrading to a Ryzen 5000 series chip. Super fast shipping to the southern hemisphere (although it was delayed by local customs)! Thanks B&H.
Madaline Aufderhar
Verified Purchase
The board has really nice heatsinks and has many features, worked with my ryzen 7 3700x just fine
Thaddeus Ernser
Verified Purchase
was overpriced when I bought it but was the only board that fit every thing I needed when I was able to purchase a gpu
Bennett Runte
Verified Purchase
So far this board has been working well for my Ryzen 5 3600x. The UI works fine enough. It was very easy to enable overclocking and my XMP profile. The board was able to select the correct memory profile to run at 3600 MHz. I receive the advertised speeds on my M.2 NVMe SSD. My problem comes with the install CD and the 2.5 Gbps LAN controller. Windows 10 doesn’t even have a basic driver so I can’t connect to the internet after first boot. So I attempted to use the install CD in a USB CD reader. Each time I tried to install the LAN driver, the PC would completely lock up and need to be reset. So I had to go on another computer to download the driver, put it on a flash drive, and then install it. Really annoying.
Nick Adams
Verified Purchase
Works great, love the NVMe’s.
Heaven Schulist
Verified Purchase
Bought this for my wife along with a Ryzen 7 3700X. She has been using a Core 2 Duo, GT 630, 8GB DDR3, etc since 2012 until 2019 before we got married. Her seeing the difference in creating contents really marked a beautiful smile on her face and that’s what matters. Thanks B&H for making it seamless. Appreciate it very much!
Virgil Block
Verified Purchase
Initially, my Motherboard had a bent and broken capacitor. Now, months later, the plastic clip that holds in the GPU has broken. Not a bad Motherboard outside of those issues. At least it was cheap.