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MSI MAG B550M Mortar Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, Micro-ATX, AMD Ryzen 5000 Series Processors)

4.5 4.5 out of 5 stars 433 ratings

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About this item

  • Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
  • Supports dual channel DDR4 memory up to 128 GB (4400 MHz)
  • 2.5G LAN with LAN Manager
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 GEN 2
  • AUDIO BOOST rewards your ears with studio grade sound quality for immersive gaming experiences
  • Premium Thermal Solution: Extended heatsink with additional choke thermal pad rated for 7W/mk and PCB with 2oz thickened copper
  • Pre-installed I/O Shielding for convenience and protection from electrostatic discharge
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MSI MAG B550M Mortar Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, Micro-ATX, AMD Ryzen 5000 Series Processors)
MSI MAG B550M Mortar Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, Micro-ATX, AMD Ryzen 5000 Series Processors)
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Price$268.00$159.99-6% $169.99
List:$179.99
$119.99-17% $99.99
List:$119.99
$194.36
Delivery
Get it Apr 3 - 8
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
For gaming
4.1
4.2
4.7
3.8
3.9
3.8
Stability
3.1
4.2
4.5
3.8
3.7
3.8
Value for money
3.9
3.6
4.0
3.6
Tech Support
3.1
4.1
4.5
3.6
Sold By
TopBestBuyDotCom(Ships Same Day)
Amazon.com
Amazon.com
Amazon.com
Amazon.com
Amazon.com
platform
windows 10
windows 10
windows 11
windows 10, windows 11
windows 10
windows 11
cpu socket
Socket AM4
Socket AM4
Socket AM4
Socket AM5
Socket AM4
Socket AM5
memory slots
4
4
4
4
4
4
memory capacity
128 GB
64 GB
128 GB
64 GB
128 GB
192 GB
compatible processors
AMD 3rd Generation Ryzen
AMD Ryzen 5000 Series, 5000-G Series, 4000-G Series and 3000 Series
Supports AMD Ryzen 7000 Series Desktop Processors
card interface
pci e
pci e
pci e
pci e
pci e
pci e
RAM tech
DDR4
DDR4
DDR4
DDR5
DDR4
DDR5

Product Description

Powered by AMD Ryzen AM4 processors, the MSI MAG B550M MORTAR has been toughened with performance essential specifications to outlast enemies. Armed for sustained performance with Extended Heatsink Design, 2.5G LAN, Core boost, and Pre-installed I/O Shielding. Equipped with a PCIe 4.0 slot and Lightning M.2 with M.2 Shield Frozr for the latest PCIe device compatibility.

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From the manufacturer

msi mag b550m mortar

msi gaming

MSI is the most trusted name in gaming and eSports. We’ve dedicated countless hours and committed numerous resources to support the world’s most aspiring and best gamers and use their knowledge and expertise in our products in return. MSI integrated all gamer’s aspirational functions in its gaming rigs and pushing the performance beyond limits.

MAG B550M MORTAR

Advancing Ascension

Powered by AMD Ryzen AM4 processors, the MSI MAG B550M MORTAR has been toughened with performance essential specifications to outlast enemies. Armed for sustained performance with Extended Heatsink Design, 2.5G LAN, Core boost, and Pre-installed I/O Shielding. Equipped with a PCIe 4.0 slot and Lightning M.2 with M.2 Shield Frozr for the latest PCIe device compatibility.

  • Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
  • Supports dual channel DDR4 memory up to 128 GB (4400 MHz)
  • 2.5G LAN with LAN Manager
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 GEN 2
  • AUDIO BOOST rewards your ears with studio grade sound quality for immersive gaming experiences
  • Premium Thermal Solution: Extended heatsink with additional choke thermal pad rated for 7W/mk and PCB with 2oz thickened copper
  • Pre-installed I/O Shielding for convenience and protection from electrostatic discharge

msi lightning pci-e gen 4

msi enhanced thermal design

msi core boost

LIGHTNING GEN 4 SOLUTION

Strike fast with MSI Lightning Gen 4 PCI-E. Attach ultra fast PCI-E 4.0 devices and enjoy up to 64GB/s unidirectional transfer bandwidth.

ENHANCED THERMAL SOLUTION

Extended heatsink that covers the chokes, 7W/mK rated thermal pads, 2oz thickened copper PCB material, and M.2 Shield Frozr keep temperatures in check and let high-performance parts sustain extreme performance.

CORE BOOST

Core Boost combines a reserved zone of optimized circuits and premium power delivery components to create a highly efficient power system capable of precise current output to the CPU.

msi usb type c reversible

msi 2.5g lan

msi pre-installed rear io shielding

USB TYPE-C READY - Rear IO & Front Case Panel Support

Effortlessly plug in devices with reversible USB Type-C.

FAST DATA TRANSFER WITH 2.5G LAN

MAG B550M MORTAR features onboard 2.5Gbps Ethernet LAN, for gamers who demand high-bandwidth and low-latency network connectivity. Prioritize latency-sensitive applications with MSI LAN Manager for a superior online experience.

PRE-INSTALLED IO SHIELDING

Pre-Installed IO Shielding makes handling the motherboard process easier and safer. The design is grounded and protects the IO ports from potential electrostatic discharge damage from the external environment.

msi mpg b550 gaming plus msi mag b550 tomahawk msi mag b550m mortar wifi msi mag b550m mortar msi mag b550m bazooka msi b550-a pro
MPG B550 GAMING PLUS MAG B550 TOMAHAWK MAG B550M MORTAR WIFI MAG B550M MORTAR MAG B550M BAZOOKA B550-A PRO
Customer Reviews
4.6 out of 5 stars
1,062
4.7 out of 5 stars
5,244
4.4 out of 5 stars
470
4.5 out of 5 stars
433
4.4 out of 5 stars
397
4.6 out of 5 stars
2,845
CPU Support Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
Chipset / Socket AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4
DDR4 Memory Support 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4866+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz
PCIe x16 Slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slot (x16 / x4); 1x PCIe 3.0 x16 slot (x4); 2x PCIe 3.0 x1 slots
Display Output HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics)
M.2 2x M.2 2x M.2 2x M.2 2x M.2 2x M.2 2x M.2
Wireless n/a n/a 2x2 Wi-Fi with MU-MIMO 802.11 a/b/g/n/ac/ax n/a n/a n/a
Ethernet LAN Gigabit LAN 2.5G LAN & Gigabit LAN 2.5G LAN 2.5G LAN Gigabit LAN Gigabit LAN
Mystic Light 16.8 million colors 16.8 million colors n/a n/a n/a n/a
Form Factor ATX ATX Micro-ATX Micro-ATX Micro-ATX ATX

Product information

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here

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MSI

MSI MAG B550M Mortar Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, Micro-ATX, AMD Ryzen 5000 Series Processors)


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Customer reviews

4.5 out of 5 stars
4.5 out of 5
433 global ratings

Customers say

Customers like the value of the motherboard, mentioning it's very good for the price. However, some customers have mixed opinions on quality, and ease of use.

AI-generated from the text of customer reviews

8 customers mention6 positive2 negative

Customers like the value of the motherboard. They say it's a solid motherboard for the price.

"...The price was right, the features are right, I am a happy camper!" Read more

"Budget but very good for the price. It is worth it 100%. Memory overclocks are solid as is everything else in this board except the Io...." Read more

"...While this board is really great it's not worth over $200." Read more

"Great for the money, but you definitely need to be ready to have a fresh flash drive on hand to update the BIOS, or else some features of the more..." Read more

24 customers mention16 positive8 negative

Customers are mixed about the quality of the motherboard. Some mention it's a great MSi quality board, with excellent OC features and quality, while others say that it'd be better off with a different brand. Some say that the optical SPDIF broke along with all the audio ports, and that the memory overclocking potential is pretty bad.

"...Pros:This motherboard is great. Has all of the BIOS features that you could ever want and then some...." Read more

"...VRMs are great that you can increase your switching frequency to even 800 kHz and it will do it but don't do it unless you are putting CPU under..." Read more

"...- Memory overclocking potential is pretty bad for those that want to do 4x16 (samsung b die)...I suggest going with Crucial 4x16 kits as the new..." Read more

"Budget but very good for the price. It is worth it 100%. Memory overclocks are solid as is everything else in this board except the Io...." Read more

11 customers mention7 positive4 negative

Customers are mixed about the ease of use of the motherboard. Some mention that the BIOS is very user friendly, and it's fairly easy to do simple overclocks and save profiles. However, others say that they have encountered numerous issues and a time consuming dilemma.

"...Pros:This motherboard is great. Has all of the BIOS features that you could ever want and then some...." Read more

"...Only problem I had was the display was blank. This caused a time consuming dilemma. I used on older graphics card. To make a long story short...." Read more

"...+ Very user friendly BIOS with constant updates...." Read more

"...PROS- UEFI Bios is really nice and simple- Fairly easy to do simple overclocks and save profiles-..." Read more

Good motherboard for most users not into heavy overclocking
4 Stars
Good motherboard for most users not into heavy overclocking
This motherboard is pretty good if you want to just do light to moderate overclocking. Memory overclocking isn't the greatest for Samsung b-die memory (2x16 TridentZ 3200CL14 kit oc'd to the screenshots shown). I could only get the memory overclocked to 3600CL-16-16-16-32-48 at trfc 324 (Gear Down Mode enabled) with pbo2 (manual) w/ curve optimizer settings. This is at 1.41V (vdimm), but voltage is around 1.425V.Paired with Ryzen 5800X cooled by NH-D15S (settings below)------------------------------------------------------------------------NB / SOC: AUTO (basically its 1.096 - 1.104V)VDDG CCD: .980VVDDG IOD: 1.030VVDDP: AUTO (0.900V)Curve Optimizer (per core)-------------------------------Max PBO2 OC: AutoBest cores (two): -10Rest of cores: -20PBO2-------Manual (mode - basically default)PPT: 142WTDC: 95AEDC: 140APROS- UEFI Bios is really nice and simple- Fairly easy to do simple overclocks and save profiles- NVME gen 3/4 heatsink is nice- PS/2 port works as long as you do a simple Google search to edit the 'registration' value via 'regedit' (as admin)CONS- CMOS battery location is awful as it's blocked by your GPU- Not a whole lot of space fitting in a NH-D15S cpu cooler in an mATX case (YMMV - I use an old Silverstone TJ08-E mATX case)- Memory overclocking potential is pretty bad for those that want to do 4x16 (samsung b die)...I suggest going with Crucial 4x16 kits as the new ones are single-ranked and not dual-ranked.- POST times are pretty mehTips-----Install the latest bios driver and LAN drivers first onto a 'usb flash' drive.Place that usb drive into the 'bios' usb port.
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Reviewed in the United States on April 26, 2022
2 people found this helpful
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Reviewed in the United States on September 20, 2020
11 people found this helpful
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Reviewed in the United States on December 19, 2020
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5.0 out of 5 stars Good to buy
Reviewed in the United States on December 19, 2020
This is the famous MSI B550M Mortar motherboard.

-System Specifications-
M/B: MSI MAG B550M Mortar
CPU: AMD RYZEN 5 3600
SSD: Western Digital 500GB WD_Black SN750
RAM: Samsung DDR4 25600 8G x 2
VGA: Gforce RTX 3070 BLACK EDITION OC D6 8GB

*Because it is not a WIFI version, I purchased an additional WiFi 6 AX3000 PCIe WiFi Card from Amazon.

Install the main board in the PC case and insert the power wires one by one after installing the power.
After assembling all the CPU, memory and graphics cards, try running. Fortunately, it booted without any problems, and all parts were fully compatible.

Some motherboards didn't fit well when the RAM was inserted, and there were times when they were uncomfortable when they entered, but the B550m mortar motherboard was different because it was neatly inserted.

Since the PBO function is set to Auto by default, nothing else was touched. The B550m mortar motherboard seems to be stable overclocking because of its excellent power supply.

It seems to fit well with the AMD RYZEN 3600 CPU and Gforce RTX 3070 graphics card. Here are the 3D benchmark test results.
Time Spy: 11,449 (Graphic 13,315, CPU 6,382)
Fire Strike: 24,042 (Graphic 32,383, CPU 18,761)

-Overall review-
Advantages: USB FLASH BIOS update, Stable Overclocking
Cons: Not yet :)
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2 people found this helpful
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Reviewed in the United States on April 21, 2021
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Alb
4.0 out of 5 stars Good motherboard for most users not into heavy overclocking
Reviewed in the United States on April 21, 2021
This motherboard is pretty good if you want to just do light to moderate overclocking. Memory overclocking isn't the greatest for Samsung b-die memory (2x16 TridentZ 3200CL14 kit oc'd to the screenshots shown). I could only get the memory overclocked to 3600CL-16-16-16-32-48 at trfc 324 (Gear Down Mode enabled) with pbo2 (manual) w/ curve optimizer settings. This is at 1.41V (vdimm), but voltage is around 1.425V.

Paired with Ryzen 5800X cooled by NH-D15S (settings below)
------------------------------------------------------------------------
NB / SOC: AUTO (basically its 1.096 - 1.104V)
VDDG CCD: .980V
VDDG IOD: 1.030V
VDDP: AUTO (0.900V)

Curve Optimizer (per core)
-------------------------------
Max PBO2 OC: Auto
Best cores (two): -10
Rest of cores: -20

PBO2
-------
Manual (mode - basically default)
PPT: 142W
TDC: 95A
EDC: 140A

PROS
- UEFI Bios is really nice and simple
- Fairly easy to do simple overclocks and save profiles
- NVME gen 3/4 heatsink is nice
- PS/2 port works as long as you do a simple Google search to edit the 'registration' value via 'regedit' (as admin)

CONS
- CMOS battery location is awful as it's blocked by your GPU
- Not a whole lot of space fitting in a NH-D15S cpu cooler in an mATX case (YMMV - I use an old Silverstone TJ08-E mATX case)
- Memory overclocking potential is pretty bad for those that want to do 4x16 (samsung b die)...I suggest going with Crucial 4x16 kits as the new ones are single-ranked and not dual-ranked.
- POST times are pretty meh

Tips
-----
Install the latest bios driver and LAN drivers first onto a 'usb flash' drive.
Place that usb drive into the 'bios' usb port.
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One person found this helpful
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Reviewed in the United States on August 7, 2021
Reviewed in the United States on July 18, 2023
One person found this helpful
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Reviewed in the United States on May 16, 2022

Top reviews from other countries

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Dan
5.0 out of 5 stars something solid
Reviewed in Canada on August 2, 2021
Carlos Albarrán
5.0 out of 5 stars Una opción competitiva con buenas prestaciones.
Reviewed in Mexico on February 3, 2021
joy
5.0 out of 5 stars Excellent Board.
Reviewed in the United Kingdom on June 1, 2021
David
5.0 out of 5 stars Good Motherboard
Reviewed in Singapore on August 13, 2023
Alan
5.0 out of 5 stars Diseño sobrio y calidad excelente
Reviewed in Mexico on October 31, 2021