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
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Availability:
20 left in stock
Arrives
Sunday, Jul 20
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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
Product Dimensions: 9.6 x 9.5 x 2 inches
Item Weight: 2.1 pounds
Manufacturer: ASUS
Item model number: Prime B450M-A II
Date First Available: October 1, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Jul 20
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: mATX
Size: PRIME B550M-A AC
Excelente Placa Madre, buena marca y precio ajustado, por su precio no le puedes pedir mucho, pero cumple al incorporar chipset b550 a éste precio, y algo de protección en las VRM, además tiene wifi lo cual es increíble.
Reviewed in the United States on June 15, 2025 by Amazon Customer
Style: ATX
Size: PRIME B550-PLUS
Bought this one to replace a dead Asrock board. It posts on first try, and starts Window 11 from old drive without any issue. This board is refurbished. Hopefully, it would last.
Reviewed in the United States on June 14, 2025 by Maple Land Maple Land
Style: mATX
Size: PRIME B550M-A AC
THE PRODUCT ITSELF IS NOT DEFECTIVE JUST THAT IT NEEDS AN INSTALLATION METHODOLOGY FIRST INSTALL THE AMD PROCESSOR AND A RAM MEMORY IN THE A2 SLOT AND START THE PC, THEN ENTER THE BIOS AND TURN OFF THE PC, THEN ADD THE SECOND RAM MEMORY IN THE B2 SLOT AND TURN OFF THE PC, THEN ADD THE NVME OR SATA STORAGE AND START THE PC AGAIN AND ENTER THE BIOS, FINALLY TURN OFF THE PC AND BOOT FROM THE NVME OR SATA STORAGE NORMALLY, IF THESE STEPS ARE NOT DONE LIKE THIS THE BOARD WILL NEVER START AND WILL REMAIN IN AN INFINITE CYCLE OF RESTARTS, THIS IS INFORMATION THAT I DID NOT KNOW AND I HAD TO LEARN AFTER SPENDING MORE THAN 3 DAYS TRYING TO GET THIS BOARD WORKING, HOPEFULLY THIS HELPS SOMEONE ELSE. EL PRODUCTO EN SI NO ES DEFECTUOSO SOLO QUE NECESITA UNA METODOLOGIA DE INSTALACION PRIMERO INSTALAR EL PROCESADOR AMD Y UNA MEMORIA RAM EN EL SLOT A2 Y ARRANCAR EL PC, POSTERIORMENTE ENTRAR AL BIOS Y APAGAR EL PC, AGREGAR LUEGO LA SEGUNDA MEMORIA RAM EN EL SLOT B2 Y APAGAR EL PC, LUEGO AGREGAR EL ALMACENAMIENTO NVME O SATA Y VOLVER A ARRANCAR EL PC Y ENTRAR AL BIOS, FINALMENTE APAGAR EL PC Y ARRANCAR DESDE EL ALMACENAMIENTO NVME O SATA NORMALMENTE, SI ESTOS PASOS NO SE HACEN ASI LA BOARD NO ARRANCARA NUNCA Y QUEDARA EN UN CICLO INFINITO DE REINICIOS, ESTA ES UNA INFORMACION QUE YO DESCONOCIA Y TUVE QUE APRENDER DESPUES DE PASAR MAS DE 3 DIAS INTENTANDO HACER FUNCIONAR ESTA PLACA, OJALÁ A ALGUIEN MAS LE SIRVA ESTO.
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Reviewed in the United States on February 14, 2025 by Pablo Pablo
Style: mATX
Size: PRIME B550M-A WIFI II
This is a excellent motherboard. It has enough "hooks" for what you'll need. The price point was excellent. The motherboard was easy to install into the case I had purchased. So the size of the board isn't too large or small. I did have to download and test multiple wi-fi drivers because the one on the board is definitely unique.
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Reviewed in the United States on May 31, 2025 by ACE
Style: mATX
Size: PRIME B550M-A WIFI II
El producto llego rapido y lleno intacto, muy buen servicio
Reviewed in the United States on June 28, 2025 by Oscar Palacio Duque
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