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 Gen 2, BIOS Flashback, and Aura Sync)
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*Price sourced from Amazon.com. Last updated 2026-04-20. Price and availability subject to change.
Bottom line: The 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 Gen 2, BIOS Flashback, and Aura Sync) is a niche pick — read recent reviews before buying in the motherboards category, priced around $134.99. Compare close alternatives before committing.
The ASUS Prime B450M-A II is a micro ATX AM4 motherboard built for first-time Ryzen builders who want room to grow. It drops in Ryzen 5000, 3rd, 2nd, and 1st Gen AMD Ryzen processors on the AM4 socket, and its four DIMM slots take up to 128GB of DDR4 at speeds as high as 4400 MHz overclocked. You get onboard M.2 NVMe storage, USB 3.2 Gen 2 ports rated at 10Gbps, and a three-way display output stack with HDMI 2.0b, DVI, and D-Sub, so integrated-graphics builds and discrete-GPU builds are both covered on day one. ASUS backs the board with VRM and PCH heatsinks using extended surface area plus…
SpecPicks Verdict
SpecPicks scored ASUS Prime B450M-A II AMD AM4 (Ryzen 5000, 3rd/2nd/1st Gen Ryzen… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the motherboards category. Compare with similarly-priced alternatives in the motherboards category before committing. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.
Common buyer scenarios for motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ PC DIY Friendly: With BIOS Flashback and ASUS exclusive UEFI BIOS
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key 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.
Full Specifications
| Brand | ASUS |
|---|---|
| USB 2.0 | 12 |
| Platform | Windows 10 |
| CPU Model | Others |
| CPU Socket | Socket AM4 |
| Model Name | B450M-A II |
| Chipset Type | AMD B450 |
| Connectivity | USB |
| Model Number | Prime B450M-A II |
| Compatibility | PC |
| AMD AM4 Socket | Compatible to Ryzen 5000, 3rd/2nd/1st Gen AMD Ryzen CPUs.Operating System : Windows 10 64-bit. Windows 7 64-bit |
| Item Type Name | 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 Gen 2, BIOS Flashback, and Aura Sync) |
| Mfr Part Number | Prime B450M-A II |
| Number of Items | 1 |
| Number of Ports | 6 |
| PC DIY Friendly | With BIOS Flashback and ASUS exclusive UEFI BIOS |
| Total Usb Ports | 6 |
| Processor Socket | Socket AM4 |
| Total PCIe Ports | 1 |
| Total SATA Ports | 2 |
Ready to buy?
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 Gen 2, BIOS Flashback, and Aura Sync) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
View Current Price on Amazon →
*Price sourced from Amazon.com. Last updated 2026-04-20. Price and availability subject to change.
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