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ASUS PRIME B450M-A/CSM AM4 AMD B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard

Ships from United States.

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  • Powered by 2nd generation AMD Ryzen AM4 processors to maximize connectivity and speed with NVMe M.2, USB 3.1 Gen2, DDR4 and Gigabit LAN
  • ASUS Corporate Stable Model complimentary Advance Replacement and long lifecycle with a COM header and PS2 ports for legacy needs
  • 5X Protection III hardware-level safeguards provide component longevity and reliability
  • Aura Sync RGB header provides a nearly endless spectrum of colors with the ability to synchronize effects across an ever-expanding ecosystem of enabled products
  • Unique SafeSlot Core fortified PCIe slot prevents damage caused by heavyweight GPUs

  • Overview
  • Specs
  • Warranty & Returns
  • Reviews

Learn more about the ASUS PRIME B450M-A/CSM

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.
Anonymous
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Great Budget Motherboard 8/3/2020 1:14:01 PM

Pros: 1. Works with 3rd gen ryzen out of the box.

Cons: Not great for overclocking due to no VRM heatsinks.

Overall Review: Ive bought two of these motherboards thus far. Bought one and it worked well with my ryzen 5 3600, so i decided to purchase another. It will work with 3rd gen ryzen out of the box. If you have extra cash go with a different motherboard with better VRM.

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Anonymous
Ownership: 1 week to 1 month
Verified Owner
4/ 5
"OK" Budget Option 7/22/2020 7:10:09 AM

Pros: - Supports Ryzen 3000 series out of the box (tested with 3700X)
- 4 DIMM slots with small size form factor

Cons: - Front Panel USB3 Connector is very loose (plastic housing came out when I removed the connector to re-route cable)

Overall Review: Decent product for a Ryzen 3000 series build, very convenient that no BIOS update is needed out of the box if you don't happen to have a spare CPU lying around.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
solid budget b450 board 7/22/2020 12:49:40 AM

Pros: 4 dimm slots
2 chassis fan headers

Cons: no vrm heatsinks

Overall Review: solid budget b450 board, paired it with a 3200g, and used the integrated gpu for 2 months, then got a 5600xt. no issues with the board, and if you do use an apu and use the igpu, then this board does allow for you to allocate more than 2gb of system ram to your igpu, a lot of boards cap it at 2gb, but this board allowed 3gb when i had 16gb ram (if you have more than 16gb ram then maybe it would let you allocate more than 3gb?) anyways, no complaints, bios is solid and has all the features you would expect, no heatsinks on the vrm, but that shouldnt be an issue.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Best Budget Motherboard 7/15/2020 9:58:40 AM

Pros: Plenty USB Ports
Easy to Install
Drivers work very well
Ryzen 3000 support out of box
Its Asus

Cons: None

Overall Review: I would recommend this as the best budget MATX motherboard for people who are building with limited money or who just need a quality motherboard that gets the job done.

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Good Board 7/15/2020 8:43:31 AM

Pros: Good for beginners

Cons: Only one fan input

Overall Review: Solid board for beginner to mid builds.
The only problem is the board only has one fan header
Obviously most builds need more than that especially for gaming so just keep in mind you will need to connect your second case fan into your power supply. I did this with a molex adapter

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Happy with board 7/13/2020 12:01:02 PM

Pros: I am happy with the performance of this board. I run FreeBSD on this board, with an AMD Ryzen 3. No issues in bring-up.

Cons: I do wish Asus had a little better documentation on the headers and jumpers on this board.
There were a couple of jumpers for which I could not find any documentation.
There were a couple for which I could not find pin-outs.
However, these were minor, and did not prevent installation.

Overall Review: I recommend this board for it's "clean" looking manufacture, and it's price/performance.

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Anonymous
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Good board for the price 7/7/2020 3:39:00 PM

Pros: Only AM4 board in stock a few weeks ago when I was putting a system together. It was supposed to be a temporary board until some X570s were in stock. I was pleasantly surprised at the features per dollar for this board. It now resides in my Wife’s parents computer.

Cons: Only has PCIe v3, but given the chipset that’s a given

Overall Review: Great board for the cost

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Great product. But build was kind of strange 7/4/2020 9:02:32 AM

Cons: The screws were kinda big for the motherboard and the holes were inconsistent sizes so only a few screws fit

Overall Review: But it works great and would reccomend

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