ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard with PCIe 4.0, WiFi 6, ECC Memory, HDMI 2.1, RGB Header
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Availability:
Only 5 left in stock, order soon!
Arrives
Monday, Jun 15
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Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
Features
- AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs
- Ultrafast Connectivity: 1x PCIe 4.0 x16 SafeSlot, WiFi 6 (802.11ax), 1Gb LAN, dual M.2 slots (NVMe SSD)one with PCIe 4.0 x4 connectivity, USB 3.2 Gen 2 Type-A , HDMI 2.1 (4K at 60HZ), D-Sub & DVI
- Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2 utility
- 5X Protection III: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O
- Boosted Memory Performance: ASUS OptiMem proprietary trace layout allows memory kits to operate at higher frequencies with lower voltages to maximize system performance.
Description
Powered by 3rd Gen AMD® Ryzen™ processors, the ASUS Prime B550M-A WiFi II delivers next-generation speeds with PCIe 4.0, WiFi 6 and 1Gb LAN. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, the ASUS Prime B550M-A WiFi 6 provides mainstream PC users and DIY PC builders with a perfect all-around foundation via intuitive software and firmware features.
Brand: ASUS
CPU Socket: Socket AM4
Compatible Devices: Personal Computer
RAM Memory Technology: DDR4
Compatible Processors: AMD 3rd Generation Ryzen
Chipset Type: AMD B550
Memory Clock Speed: 2133 MHz
Platform: Windows 10
Model Name: PRIME B550M-A WIFI II
CPU Model: Others
Processor: others
RAM: DDR4
Memory Speed: 2133 MHz
Wireless Type: 802.11a/b/g/n/ac, 802.11ax
Number of USB 2.0 Ports: 11
Brand: ASUS
Series: PRIME B550M-A WIFI II
Item model number: PRIME B550M-A WIFI II
Item Weight: 2.55 pounds
Product Dimensions: 10.8 x 10.5 x 2.8 inches
Item Dimensions LxWxH: 10.8 x 10.5 x 2.8 inches
Color: BLACK
Manufacturer: ASUS
Date First Available: July 6, 2022
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jun 15
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
NOTICE: When installing the audio and network drivers, you may need to use the CD included since that is how the drivers were able to be successfully installed for those components. Downloading from the website did not work, and the CD installer will auto detect and mark what drivers are installed. Great motherboard particularly if you get it sub $90. It has BT 5+ and comes with WIFI6 chip and an antenna which works tremendous compared to my external Wifi 6 adapter. No USB-C and only one HDMI port along with older video ports, but the trade offs are that it comes with Bluetooth and Wifi 6. It does have PCIE4 x16 and (1)PCIE4 x4 m.2 along with a PCIE3 x4 m.2. Highly recommend it if you want a B550 chipset micro-atx board with built in bluetooth and wifi 6 modules.
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Reviewed in the United States on December 13, 2025 by William
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
I have been building computers for over 20 years, kind of like Asrock motherboards the most. Been wanting a B550 chipset so I can get REAL PCI 4.0 throughput on M.2. Installed this over the weekend and I will say I am impressed. Not a single hang or freeze. Tried 3 diff 4x4 M.2 hard drives. ONLY the Kioxia KBG8... gave me the 4.0 boost, my highest bench was 3900, up from 2800 w 3x4. I am running a R7 3700x, plugged it in and working great. The wifi driver would not load automatically thru windows. Go to Asus website and Wi-Fi drivers, click on more and download all 3 different chipsets. I think it's the 8852BE driver. Try them all, it will work eventually.
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Reviewed in the United States on March 24, 2025 by Matthew D. Mercer
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
Can't say enough about this product. I was very specific on my needs like bluetooth and WiFi and this had it all. Yes, it's not the latest tech as it is still PCIe 4.0 vs 5.0 that's all I needed: light gaming and a very strong workstation. Tried and true no crashing or hiccups. The Bios was the latest update so when I installed the CPU, Ryzen 7 5700g, it booted right up no updates needed. This fit the bill. The only catch is that once installed some drivers need updating like Bluetooth. I thought windows was strong enough to update but it wasn't however Ausu provided a cd that corrected the proper drivers and once done everything worked perfectly (luckily, I has an external cd player to use). Definitely recommended.
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Reviewed in the United States on December 3, 2025 by mbPA
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
The product itself was fine, it works well, still worth it for the price of what was available at the time, but it was missing a few screws for me, especially an m.2 standoff and one of the screws as well I think, and I had to use other personally owned mounting screws because I didn't find any in the box. That might just be the seller and not the product itself tho, so still a good product
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Reviewed in the United States on November 29, 2025 by Kairu
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
TBH, I picked this board mainly to pair with my Ryzen 5, and the build experience was better than expected. The biggest highlight has to be the integrated Wi-Fi and Bluetooth. It saved me from the hassle of running cables at home; the signal is rock solid, and it saved me the cost of an extra network card—10/10, worth it! The BIOS is super user-friendly, allowing even a beginner builder to easily set up XMP. No cap. Tbh, the port selection is kinda basic, but it’s def sufficient for daily use. The PCIe 4.0 support gives me peace of mind for future SSD upgrades. If your priority is stability, ease of use, and a no-fuss setup, this M-ATX board is a top-tier value pick among B550s. Highly recommended for stable performance-seekers like me! Goated board.
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Reviewed in the United States on November 13, 2025 by Jo Jo
Style: Prime B550M-A WiFi II (Pack of 1)
Size: Micro ATX
This is an otherwise good motherboard, but the reason for the one star rating is because mine came with no WiFi functionality whatsoever. There are several, maybe even dozens, of other reviews of this product saying something to the same effect. Someone else in these reviews by the name of Dan V. discussed the product in better detail on concerning the WiFi problem; I'm pretty sure you can find the one he made on April 7, 2025 if you look for it or search "wifi" in the reviews search tools. Apparently he did find a way to make the WiFi drivers work, but he was only able to do this by searching through Reddit for alternative drivers and literally ignoring the drivers Asus provides on their website for this specific motherboard. He decided to go with the MSI B550M-VC WIFI which he said did not suffer from the same issue and neither did anyone else in that model's reviews. Now, I'm as not adept at building PC's, so I was on the phone with Asus support for probably five hours total and at the end of it, they told me to fill out a lengthy return form so it can be "repaired"... except they charge you for the shipping which, for me, was around $20 for standard UPS ground. I decided to just return it through Amazon and hope to get a full return on it. I've used Asus products in the past and although they have excellent performance, an issue like this is unacceptable. I was even going to see if I could purchase a more recent Asus motherboard with WiFi capability, but lo and behold that one suffered negative reviews for the same reason! This motherboard is advertised as coming with WiFi capability, but if you use Windows 10/11 then you will be stuck with using an ethernet chord. I understand that it's only one problem and that everything else may perform amazingly, but if you're planning on having your PC in a room without an ethernet connection, you're done. This is false advertising and tremendously unfair to anyone who assumes that this unit's WiFi capability should work the way it's supposed to. I can guess that most of the positive reviews of this product are from customers who used an ethernet connection with this device and did not notice the WiFi problem if they were running Windows.
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Reviewed in the United States on August 29, 2025 by David Tonda