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MSI MAG B550M MORTAR AM4 AMD B550 SATA 6Gb/s Micro ATX AMD Motherboard

Ships from United States.

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  • AMD B550
  • Supports AM4 socket 3rd Gen AMD Ryzen processors, and future AMD Ryzen processors with BIOS update
  • Supports DDR4 3200/ 3066/ 3000/ 2933/ 2800/ 2667/ 2400/ 2133/ 1866 MHz by JEDEC
  • Supports DDR4 4400+/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
  • 1DPC 1R max speed 4400 MHz
  • 1DPC 2R max speed 3733 MHz
  • 2DPC 1R max speed 3866 MHz
  • 2DPC 2R max speed 3466 MHz

  • Specs
  • Warranty & Returns
  • Reviews

Learn more about the MSI MAG B550M MORTAR

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Awesome 7/31/2020 4:04:54 PM

Pros: A great Mobo with the trimmings one needs. Feels like a quality built Mobo. All the headers are spread out for cable management. Plenty of USB. Also plenty of front headers if your case has the extra ports.

Cons: The second m.2 slot WILL NOT read sata. I missed that part in the specs. Not a huge deal but bummer I can't use the extra m.2 sata I have lying around not getting put to use

Overall Review: Great Mobo that I would definitely recommend for a mid range PC.

Did you find this review helpful?
Manufacturer Response:
Dear Matt,

Thank you for sharing your thoughts on the MSI MPG B550M Mortar motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Anonymous
Ownership: 1 week to 1 month
Verified Owner
5/ 5
B550 Mortar totally worth it! 7/28/2020 9:21:14 AM

Pros: - Next Gen CPU Support
- NVME Gen 4 support
- GPU PCIe slot definitely sturdy
- Great MOBO overall

Overall Review: I would definitely suggest this board for anyone looking at X570's but don't like the price point.
there are some serious overlap between the models but the price is awesome overall.

Did you find this review helpful?
Manufacturer Response:
Dear Valued Customer,

Thank you for sharing your experience with the MSI motherboard! If you would like further technical assistance, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Great product easy set up 7/22/2020 9:00:52 PM

Pros: easy set up
lots of rbg headers
good product for the price
2 M.2s

Cons: kinda tight in areas
no mystic lighting

Overall Review: i would very highly recomend this item

Did you find this review helpful?
Manufacturer Response:
Dear Valued Customer,

Thank you for sharing your experience with the MAG B550M MORTAR motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Fantastic! No downsides. 7/3/2020 11:50:13 PM

Pros: The Bios is easy to use and has a search function if you don't know where to find something.
I like that the manual helps you know what is where and the board helps too with the clear labels.

Cons: I don't know if 3 pwm fan headers are a normal number to have for a micro-atx motherboard, but for me it wasn't enough. But that's more of my problem than the board's.

Overall Review: It looks incredible and blends with any other part making it look amazing (my color scheme is black everything). Everything works properly and the pin layout is hassle free, so building your PC is more fun. It's a great launch to the B550 chipset in my opinion, I'm very satisfied with it and I have no intention on changing to a different board.

Did you find this review helpful?
Manufacturer Response:
Dear Michael,

Thank you for reviewing the MSI MAG B550M MORTAR! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Working as intended! 7/2/2020 3:00:14 PM

Pros: - Impressed by the build quality and sturdiness of the port panel.
- No issues so far.

Cons: - The heavy-duty port panel heatsink is literally pretty heavy. This may be a pro for some.

Overall Review: Very happy with the board so far. It seems solid. Higher build quality than expected. My only regret is not getting the WiFi variant, but I do like the darker colors of this one.

Did you find this review helpful?
Manufacturer Response:
Dear Kyle,

Thank you for sharing your experience with the MAG B550M MORTAR motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Really good, small board 7/2/2020 7:42:43 AM

Pros: -good for overclocking.
-plenty of space for RAM.
-improvement over last board in the 6x SATA 6.0 GB/s connections
-has 5 USB ports, from 2.0-3.2, mixed with the case I have to eliminate the USB hub I was using.

Cons: -Only has connectors for 5 fans in total, including the CPU fan(s).
-Reset CMOS pins are under the GPU which is kinda dumb but I didn't have to remove the card to reset.

Overall Review: I think I got this for a really good price seeing as I preordered this to use with my Ryzen 5 3600 without needing a secondary CPU to update the BIOS. I would have given it a 4.5 eggs for the number of fan connectors but I don't feel that it's deserving of 4 eggs so I gave it 5.

Did you find this review helpful?
Manufacturer Response:
Dear Josh,

Thank you for sharing your experience with the MAG B550M MORTAR motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Well worth the price premium 6/30/2020 8:35:38 AM

Pros: -Beefy VRMs
-Onboard Sound
-NVME pad

Cons: -none

Overall Review: Would recommend spending the extra

Did you find this review helpful?
Manufacturer Response:
Dear Maliha,

Thank you for sharing your experience with the MAG B550M MORTAR motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Love it 6/29/2020 5:40:25 AM

Pros: Tons of convenient features, LEDs on the board that show you if your CPU/GPU/RAM/Storage or causing boot failure. Mystic Light works great controlling all of my LEDs. S/PDIF digital audio. USB-C front connector and back. Future proofing galore with PCI-E 4.0 m.2 and GPU lanes. Very detailed and easy to reference manual that covers everything.

Cons: BIOS is a little unintuitive and clunky. For some reason the manual says you have to put your first ram module in DIMM slot A2 first, not really sure why but there is a big warning.

Overall Review: Paired this with a 5700xt, Ryzen 3600, and 16GB Trident RGB

1 out of 1 people found this review helpful. Did you?
Manufacturer Response:
Dear Jared,

Thank you for sharing your experience with the MAG B550M MORTAR motherboard! If you ever require technical assistance or warranty support, please feel free to contact our technical support department directly at 626.271.1004 from M to F, 9am to 6pm Pacific Standard Time.

Thanks for choosing MSI!

Best Regards,
MSI Review Team
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