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)
*Price sourced from Amazon.com. Last updated 2026-07-22. 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 retro motherboards category, priced around $99.99. Read recent reviews carefully before committing.
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.
SpecPicks Verdict
SpecPicks classifies ASUS Prime B450M-A II AMD AM4 (Ryzen 5000, 3rd/2nd/1st Gen Ryzen… as a niche pick — read recent reviews before buying in the retro motherboards category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for retro 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 Ports | 6 |
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.
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Related Retro Motherboards
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best 1440p Gaming GPUs in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best Retro Handhelds in 2026 — From $35 to $500
- How to Build a Windows 98 Retro PC in 2026
More reviews from the SpecPicks archive
Browse all reviews →- Hidden Code in Claude Code Flagged Chinese Users: What It Means for Local-LLM Privacy
- Is the RTX 3060 12GB Still Worth It for 1440p Gaming in 2026?
- Best Single-Board Computers for Home Lab in 2026
- Raspberry Pi 4 8GB Local LLM Throughput in 2026
- Self-Hosting DeepSeek on an RTX 3060 12GB: What Fits in 2026
- RTX 3060 12GB vs RTX 4060: Best Budget GPU for 1080p Gaming + Local AI
- UT99 OldUnreal 469 Patch in 2026: Migrate Configs, Rejoin Modern Servers, and Tune Mouse Precision
- What Does DPS Mean in Gaming? Damage Per Second Explained
- Best SSD to Upgrade Your PS4 Pro in 2026: SATA Drives That Actually Speed It Up
- Building multi-agent AI orchestrators — LangGraph, DSPy, n8n, and picking the right one
- On-Device AI Keyboards: What a Sub-2GB LLM Needs to Run Local
- Qwen 3.6 vs Frontier Models on a Local Rig: The Honest Gap
- NVMe vs SATA SSD for a 2026 Gaming PC: WD_BLACK SN770 vs the Value SATA Trio
- Best Local LLM You Can Run on 12GB of VRAM in 2026
- Ryzen 7 9800X3D vs Ryzen 9 9950X3D: Which X3D Wins at 1440p in 2026?
- Best Raspberry Pi Alternative for Emulation (2025)
- Troubleshooting Ryzen 7 5800X Memory Training, Boot Loops, and Cold-Start Hangs on B550 in 2026
- SNES Classic vs Sega Genesis Mini: Best Plug-and-Play Retro Console in 2026
- Per-Model Hardware Picker: Matching 7B-70B LLMs to Your GPU
- Windows 98 vs Windows 2000 for a GeForce-Era Retro Gaming Build
- Ryzen 7 5800X + RTX 3060 12GB: Best 1440p AM4 Build
- A Practical Look at the PlayStation Architecture — and Why It Still Matters
- Best CPU Cooler for AM4 + Ryzen 5000 in 2026
- Best Streaming & Content-Creation Starter Kit in 2026