ASUS Prime B450M-A II AMD AM4 (Ryzen 5000, 3rd/2nd/1st Gen Ryzen Micro ATX Motherboard (128GB DDR4, 4400 O.C.), NVMe, HDMI 2.0b/DVI/D-Sub, USB 3.2 2, BIOS Flashback, and Aura Sync)
Condition: Used - Like New
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 4 left in stock, order soon!
Arrives
Friday, May 30
Style: mATX
Size: Prime B450M-A II
Features
- AMD AM4 Socket : Compatible to Ryzen 5000, 3rd/2nd/1st Gen AMD Ryzen CPUs.Operating System : Windows 10 64-bit. Windows 7 64-bit
- Designed for Productivity: USB 3.2 Gen 2 with 10Gbps ultra-fast transfer speed, onboard M.2 support, 4xDIMMs support up to 128GB DDR4 with 4400 (O.C.) performance, HDMI 2.0b/DVI/D-Sub
- Optimized Cooling: VRM and PCH heatsink with extensive surface, thermal pads help transfer heat from the inductor and phase array to the heatsink. Flexible fan controls for ultimate cooling and quietness with ASUS exclusive Fan Xpert 2 plus
- Built to Last: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O, 1000 plus compatible devices, 8000 plus Validation Hours
- PC DIY Friendly: With BIOS Flashback and ASUS exclusive UEFI BIOS
- Outstanding Gaming Audio: Dedicated audio PCB layers, premium Japanese audio capacitors, and audio shielding ensures precision analog/digital separation and greatly reduced multi-lateral interference.
- Aura Sync RGB and Armoury Crate Utility: with ASUS Armoury Crate synchronizing LED effects across a wide range of compatible PC gear, plus RGB LED and RGB header for greater customization
- Please ensure your BIOS is up to date if installing a compatible Ryzen 5000 series CPU. Visit ASUS site search by motherboard model name, click on Support tab, Drivers and Tools, then BIOS and Firmware to download the latest BIOS.
Description
Powered by Ryzen 5000, 3rd Gen AMD® Ryzen™ processors, the ASUS Prime B450M-A II provides the solid foundation needed for your first build, plus flexibility to grow with your ambitions with a robust power design, automated system tuning, comprehensive cooling controls, and immersive onboard audio.
Brand: ASUS
CPU Socket: Socket AM4
Compatible Devices: Personal Computer
RAM Memory Technology: DDR4
Compatible Processors: AMD 1st Gerenration Ryzen
Chipset Type: AMD B450
Memory Clock Speed: 2400 MHz
Platform: Windows 10
Model Name: B450M-A II
CPU Model: Others
Processor: others
RAM: DDR4
Memory Speed: 2400 MHz
Wireless Type: 801.11ac
Number of USB 2.0 Ports: 12
Brand: ASUS
Series: B450M-A II
Item model number: Prime B450M-A II
Item Weight: 2.1 pounds
Product Dimensions: 9.6 x 9.5 x 2 inches
Item Dimensions LxWxH: 9.6 x 9.5 x 2 inches
Manufacturer: ASUS
Date First Available: October 1, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, May 30
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: ATX
Size: PRIME B550-PLUS AC-HES
I used the ASUS Prime B550-PLUS AC-HES AMD AM4 motherboard for my home arcade build, and it’s been a fantastic choice. The setup was smooth and the board offers great compatibility with my components. The B550 chipset provides solid performance, and the board handles everything from light gaming to heavy multitasking with ease. I was particularly impressed with the built-in Wi-Fi and Bluetooth, which made setting up my arcade PC wireless and hassle-free. The board’s design is clean and compact, and the onboard audio is crisp, which is perfect for my arcade cabinet’s sound system. Overall, this motherboard offers incredible value for the price. It’s stable, reliable, and more than capable of supporting the needs of a home arcade system. Highly recommend for anyone looking to build or upgrade their setup!
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Reviewed in the United States on May 14, 2025 by Kevin
Style: ATX
Size: PRIME B550-PLUS AC-HES
I was building a medium budget pc and this motherboard was a great fit for a reasonable price. Great quality, spacing between components was not an issue. I have had for about 5 months and haven't had any issues with the motherboard. It handles gaming well, temperature holds well with my setup, even with some modern games. I like the lighting options, while it is not essential, but it gives it a nice look. It has handled all updates, gaming, downloads, streaming with no problem or issues, great performance. This is a great value if you are a building a mid budget pc.
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Reviewed in the United States on April 24, 2025 by C Cantu
Style: mATX
Size: PRIME B550M-A WIFI II
I bought a few motherboards from other companies, including ASRock, MSI, and Gigabyte. The MSI and Gigabyte boards were nothing but trouble, and the ASRock board failed within a few days. So, I opted to spend a few extra bucks, not be a cheapskate, and get the Asus board. I should have known better—I’ve never had problems with Asus boards. Absolutely no problems whatsoever—great performance, and it includes their AI Suite, which lets you dynamically or manually adjust fan speeds, something the other boards didn’t offer. One thing it doesn’t have is a USB-C header, but it does have a USB-A 3.2 Gen 2 port on the back. I just plug in a USB-A to USB-C cable, and that works fine for USB-C devices at full speed (10 Gbps), the same as USB-C, compared to standard Gen 1 at 5 Gbps. Another issue is that the graphics card sits very low, so if you're using a micro ATX case, you might not be able to fit case fans at the bottom—like in the Okino's case I have. Otherwise, it’s a great board.
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Reviewed in the United States on March 13, 2025 by DonT
Style: mATX
Size: PRIME B550M-A WIFI II
Great motherboard, great price for a budget build. I am not sure if it is just an issue with mine or issue with the Board itself, but the built in Wi-Fi does not work, BIOS says its enabled but going into device manager it has a driver error even after installing all the board drivers. Something to keep in mind in case it isn't just a localized issue to my board. Other than that, everything else works great like its supposed to.
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Reviewed in the United States on May 5, 2025 by David Appleby
Style: mATX
Size: Prime B450M-A II
I updated my son's Cyberpower PC to Windows 11. Everything installed successfully, including all the updates. Then after a restart the display wouldn't come on. That Mobo was an MSI B450 Tomahawk and the LED's said VGA problem. Given the circumstance I couldn't believe it suddenly died. I tried numerous times resetting the CMOS, reseating the graphics card, reseating memory, even checked the power supply, etc. I ordered this ASUS Prime B450M-A II as an economic replacement. It arrived in 2 days and was packaged well. The price dropped 2 days after I ordered. The box has labels Windows 11 ready and Ryzen 5000 Series ready. The board comes with backplate, 2 SATA cables, a M2 screw for mounting, a driver disc and the manual. This ASUS mobo is laid out differently than the MSI. I like it better. The graphics card slot is moved over one space with the M2 slot out in the open. With this Mobo you can use a M2 with a heatsink attached. The MSI M2 slot was directly under a dual-slot graphics card. I like the BIOS flashback feature (located on the back) with this board. The BIOS is laid out well, very intuitive and easy to use. I have built several computers over the years with ASUS my go-to brand. This Mobo is a great full featured B450 motherboard for AM4 series CPU's. The BIOS is upgraded to accept Ryzen 5000 series CPU's. Simply put you're getting a great AM4 motherboard for a great price.
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Reviewed in the United States on February 3, 2025 by Buckerou
La placa base ASUS Prime B550M-A AC AMD AM4 es una excelente opción para quienes buscan una solución sólida y con buena conectividad. Ofrece un rendimiento estable y eficiente, ideal para configuraciones de gama media. La integración de Wi-Fi y Bluetooth es una gran ventaja, proporcionando flexibilidad en la conexión. La calidad de construcción es sólida, y la BIOS es fácil de usar. En general, es una placa base confiable que cumple con las expectativas para usuarios que buscan un equilibrio entre rendimiento y características modernas.
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Reviewed in the United States on April 12, 2025 by Arcadio Hernandez
Style: mATX
Size: PRIME B550M-A WIFI II
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