Micro ATX motherboards are preferred by both average users as well as for enthusiasts. They offer the best combination of value, compactness and features. Therefore, particularly for casual gamers looking to build a new PC for themselves, micro ATX motherboards are highly popular.
Micro ATX motherboards do not offer as many PCIe slots or other expansion slots as compared to ATX motherboards, but most users find the available expand ability more than enough.
There is a wide variety of AMD and Intel motherboards with different form factors out there. However, in this article we will only look at the best Micro ATX motherboards for Ryzen.
As such, the selection of motherboards here is based on the AMD AM4 chipset which system for upto third generation Ryzen processors.
Comparison of Top Micro ATX Motherboards for Ryzen
|ASUS Prime |
1xPCIe x16 (x4)
|ASUS TUF Gaming|
1xPCIe x16 (x4)
|MSI MAG |
1xPCIe x16 (x4)
List of Best Micro ATX Motherboards for Ryzen in 2021
We find that the following micro ATX motherboards stand out the most in terms of value and features for the Ryzen processors.
- ASUS Prime B550M – Recommended Micro ATX Motherboard for Ryzen
- ASRock AM4 – mATX Motherboard with X570M Chipset
- GIGABYTE GA-A320M – Highly Affordable mATX motherboard for Ryzen
- ASUS TUF Gaming B550M – Recommended Gaming Motherboard
- MSI MAG B550M Mortar – Gaming mATX Motherboard with WiFi
1. ASUS Prime B550M – Recommended Micro ATX Motherboard for Ryzen
A highly recommended middle of the road motherboard for suitable for most AMD builds.
First up we have the most recommended mATX AMD motherboard for casual gamers and users. Whether you are building a budget gaming PC or a PC for video editing / photo editing, this is a model that you can look into.
For starters, note that this features the latest AMD B550 chipset with clear and visible upgrade over the previous B450 chipset. The biggest difference being that the B550 supports Ryzen 3 processors from the get go.
Previously on a select B450 motherboards, particularly the older ones, required you to upgrade the BIOS in order to support the Ryzen Gen 3 processors. That would not be necessary here.
On top of that, this features the latest PCI Gen 4 protocol, WiFi 6 Protocol and much better heatsinks or thermal pad for the chokes or the VRMs making them efficient for overclocking.
ASUS Prime B550M is particularly an affordable motherboard that comes with a built in WiFi 6. WiFi 6 offers higher number of streams, it is designed for smart home usage, and is ideal for streaming 4k/8k videos.
As far as the expansion capability goes, .
One lucrative feature of this motherboard is that it does not offer one but two M.2 slots both supporting NVME SSD. Generally on motherboard with two M.2 expansion slots, only one supports NVME SSDs. On this it supports two. NVME SSDs are mutliple times faster than SATA SSDs.
The biggest drawback of this motherboard is that it lacks an other expansion slot large enough to fit a second graphics card for a crossfire or an SLI setup.
All in all if you are looking for the latest and an advanced option at a reasonable price, then this is the best micro ATX motherboard for Ryzen.
Also Read: Best Motherboard with M.2 Slots
2. ASRock AM4 Pro 4 – mATX Motherboard with X570M Chipset
Next up we have the most popular and highly valued micro ATX motherboard suitable for Ryzen processors.
This is one of the very few micro ATX motherboards out there that offers the X570 chipset. Usually this chipset is only reserved for ATX or larger motherboards.
The best part about this chipset is that it offers an excellent phase design making them the go to choice for enthusiasts who love overclocking. This motherboard offers powerful 50A chokes as well as a 10 power phase design with a higher number of VRMs.
On top of that the X570 offers a higher number of general purpose lanes giving them a higher range of expandability.
The motherboard offers 2 x PCIE X16 slots. The first PCIe X16 slot works at full X16 bandwidth, however, the second X16 PCIe slots has an X4 bandwidth.
If you plan to have an AMD Crossfire setup with two graphics cards, you would be able to do so here since an AMD graphics card requires X4 bandwidth to work.
It should also be noted that the X4 slot here also supports an NVME SSD as a boot drive. This motherboard also offers 2 x M.2 slots, both having the capability to support the NVME SSDs.
The X570 chipset comes factory built with support for third gen Ryzen processor therefore you would not need any BIOS upgrade here.
All in all, if you are looking for an option with a premium chipset, then this is the best micro ATX motherboard for Ryzen in our opinion.
3. Gigabyte A520M S2H – Highly Affordable mATX motherboard for Ryzen
Did you come here looking to go straight for the most affordable mATX motherboard for Ryzen out there? If that is the case, then we cannot recommend anything but this.
Whether you are looking to keep the budget for your motherboard low while you maximize it for the rest of the components or looking for a motherboard for basic home use, this motherboard most certainly takes the cake.
It should be noted that this motherboard features the A520 AMD Chipset. These are budget or entry level chipsets that do not offer overclocking capacity and have fewer expansion slots. This motherboard neither has a high phase power design nor does it have powerful VRMs.
It is also worth noting here that the A520 chipset brings with itself some considerable improvement compared to the older A320 chipset. While the older chipset had PCIe 2.0 chipset lanes, this motherboard features PCIe 3.0 lanes for both Chipset as well as for the CPU.
The motherboard offers a single PCIe X16 slot for graphics card and 2 x PCIe X1 slots for smaller expansion cards.
If you are serious about building a gaming PC, we do not recommend this motherboard. This is the bear minimum motherboard you can get. Nothing gets cheaper than this for Ryzen.
However, if you just want to build an average desktop for home use for perhaps for casual editing jobs, then by all means, go for it.
So in short, if budget is your concern, then this is best micro ATX motherboard for Ryzen in our opinion.
4. ASUS TUF Gaming B550M – Recommended Gaming Motherboard
If you are a gamer looking for a suitable micro ATX motherboard with capacity to support the third gen Ryzen processors, then this is the latest and the greatest in our opinion.
Like the ASUS Prime B550M above, this too features the latest B550 chipset and thus makes way for newer protocol such as PCIe 4 as well as high quality power design with larger number of VRMs and better quality chokes.
However, the biggest difference between this and the ASUS Prime B550M above is that while ASUS Prime B550M only offered a single PCIe X16 slot for graphics card, this offers two.
In other words, this motherboard has 2 x PCIe X16 slots one of which works at X4 mode. The benefit here is that this mother board can be used for dual graphics card setup with Crossfire.
It also offers an additional 1 x PCIe X1 slot for smaller cards such as WiFi.
This motherboard also offers 2 x M.2 slots both of which can support NVME as well as SATA SSD drives with the M.2 form factor.
Besides that, . While the rest of the motherboard above only offered enough audio jacks for stereo sound system, with this you can add a 5.1 surround sound system.
To top this all, this motherboard also features RGB lights with Aura Sync to give your crib the gaming vibes.
So in the end, if you are looking for a reasonable priced gaming option, then this is the best micro ATX motherboard for Ryzen.
5. MSI MAG B550M Mortar – Gaming mATX Motherboard with WiFi
Another highly popular gaming motherboard for AMD builds. Comes with built in WiFi.
MSI MAG B550M Mortar is quite similar to the ASUS TUF Gaming B550M above in terms of performance. However, it is has a price tag primarily for the fact that it includes a built in WiFi 6.
WiFi 6 is the newest WiFi protocol that is currently supported by the B550M Chipset. The benefits of WiFi 6 range from higher stream number to faster transfer rate and range. If that is something that you value, then you may already be sold by this motherboard.
However, besides the built in WiFi, this motherboard separates itself from ASUS TUF Gaming motherboard above by incorporating larger and better quality heat sinks and a unique Duet Rail Power System with a power design of 8+2+1 for processor and RAM making it excellent for overclockers as well as enthusiasts.
As far as the expansion goes it has the same PCIE configuration as ASUS TUF Gaming B550M above, with a single PCIe X16 for graphics card and another X16 slot working at X4 mode for Crossfire setup.
However, this motherboard does feature an addition of 2 SATA slots totaling 6 as compared to 4 on the previous motherboard.
Moreover, this motherboard also offers two M.2 slot both support NVME SSDs but only one of them supports SATA SSD.
In short, if you particularly want built-in WiFi with high quality heat sink for overclocking, then this is certainly the best micro ATX motherboard for Ryzen in our opinion.
What is the mATX Form Factor?
An mATX or Micro ATX fom factor has a dimension of 9.6 inches by 9.6 inches. .
Let us review a few pointers here.
The ATX motherboard is larger than the mATX and has a dimension of 12 x 9.6 inches. On the other hand, the mini ITX motherobards are the smallest with the dimension of 6.7 x 6.7 inches.
The micro ATX motherboards offer a lower number of expansion slots both PCIe as well as SATA as compared to ATX motherboards. A micro ATX typicall has a maximum of 2 x X16 pcie slots. An ATX motherobard can easily feature 3 x X16 PCIE slots.
Compared to a mini ITX which offers only a single X16 PCIE slots and a limited number of SATA slots, the micro ATX is more expandable.
Micro ATX motherboards are the most affordable out there. They are more affordable compared to the ATX since they offer a lower number of expansion slots.
They are also cheaper than mini ITX (if you take the same specs) since mini ITX tend to charge a premium for their compact for factor.
While they are not as small as mini ITX motherboards, they do tend to promote compactness. Therefore, they are generally quite recommended for those who want to procure the smallest chassis possible for their affordable gaming setups.
Why Go for mATX Form Factor?
As mentioned earlier, micro ATX motherboards check almost all the boxes for an average PC user.
They are affordable compared to the rest, they reasonable small, and have a reasonable expansion suitable for most PCs.
Mini ITX motherboards may seem to limited particularly if you wish to extend and the ATX motherboards may seem like an overkill to most.
Easier to Build
A micro ATX PC is much easier to built as compared to the ATX motherboard. Since it has few slots and smaller dimension, it can fit in a small chassis.
Since most gamers only go for a single graphics card, there is no expert building technique required to set this system up.
One Important Note on Motherboards for Ryzen
It should be noted that while all motherboards with AM4 socket can support the the Third Gen Ryzen three processors, this may not be true from the get go.
This is particularly true if you have motherboard with an older chipset like the B450, A320 or X470. If the vendor has an old stock of motherboards with this chipset, then chances are that their BIOS would not be updated to the latest version to support the newer generation processors.
This is usually not a big issue since you can flash the BIOS to a newer version which would then enable you to support newer graphics.
This can work to your benefit as well. If you know how to flash the BIOS to newer version, you can find some pretty sweet deals on older motherboards. They are generally priced for clearance and thus much cheaper than their origial price tag.
In this article we looked at some of the best micro ATX motherboards for Ryzen build. We looked at the latest, premium as well as budget motherboards that feaure the AM4 chipset for Ryzen Gen 1,2 and 3 processors.
We also talked about why mATX motherboards are famous among most users and why going for this form factor is a good option.
Fortunately, there are plenty of options out there with both older and newer chipsets that you can buy for your AMD setup.