ASUS B450 AMD Ryzen 2 Micro ATX Gaming Motherboard AM4 DDR4 HDMI DVI VGA M.2 USB 3.1 Gen2 (Prime B450M-A/CSM)
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*Price sourced from Amazon.com. Last updated 2026-08-27. Price and availability subject to change.
Bottom line: The ASUS B450 AMD Ryzen 2 Micro ATX Gaming Motherboard AM4 DDR4 HDMI DVI VGA M.2 USB 3.1 Gen2 (Prime B450M-A/CSM) is a niche pick — read recent reviews before buying in the motherboards category, priced around $89.99. Compare close alternatives before committing.
The ASUS Prime B450M-A/CSM is a microATX AM4 motherboard built for 2nd generation AMD Ryzen processors, and its 4.6/5 star rating across 3,611 reviewers reflects how consistently it lands for budget and mid-range Ryzen builds. You get the connectivity that matters: an NVMe M.2 slot for fast boot drives, USB 3.1 Gen2 for external storage, four DDR4 memory slots, and Gigabit LAN. Display output is unusually flexible for the class, with HDMI, DVI, and VGA on the rear panel, so a Ryzen APU build can drive almost any monitor you already own without an adapter. The CSM designation is the…
SpecPicks Verdict
SpecPicks scored ASUS B450 AMD Ryzen 2 Micro ATX Gaming Motherboard AM4 DDR4 HDMI DVI… 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
- ✓ 5X Protection III hardware-level safeguards provide component longevity and reliability
- ✓ 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
- Powered by 2nd generation AMD Ryzen AM4 processors to maximize connectivity and speed with NVMe M.2, USB 3.1 Gen2, DDR4 and Gigabit LAN
- ASUS Corporate Stable Model complimentary Advance Replacement and long lifecycle with a COM header and PS2 ports for legacy needs
- 5X Protection III hardware-level safeguards provide component longevity and reliability
- Aura Sync RGB header provides a nearly endless spectrum of colors with the ability to synchronize effects across an ever-expanding ecosystem of enabled products
- Patent-pending Safe Slot Core fortified Pie slot prevents damage caused by heavyweight GPUs
Full Specifications
| Brand | ASUS |
|---|---|
| USB 2.0 | 2 |
| Platform | Windows 10 |
| CPU Socket | Socket AM4 |
| Model Name | B450M-A/CSM |
| Unit Count | 1 Count |
| Chipset Type | AMD B450 |
| Connectivity | USB |
| Model Number | PRIME B450M-A/CSM |
| Built-In Media | Motherboard |
| Chipset Family | AMD B450 |
| Item Type Name | Asus Prime B450M-A/CSM AMD AM4 (3rd/2nd/1st Gen Ryzen™) Micro-ATX commercial motherboard (1Gb LAN, ECC Memory, D-Sub/HDMI/DVI-D, TPM header, COM port, ASUS Control Center Express) |
| Mfr Part Number | PRIME B450M-A/CSM |
| Number of Items | 1 |
| Number of Ports | 3 |
| Processor Socket | Socket AM4 |
| Total PCIe Ports | 2 |
| Total SATA Ports | 4 |
| Compatible Devices | Personal Computer |
| Memory Clock Speed | 2400 MHz |
Ready to buy?
ASUS B450 AMD Ryzen 2 Micro ATX Gaming Motherboard AM4 DDR4 HDMI DVI VGA M.2 USB 3.1 Gen2 (Prime B450M-A/CSM) 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 2026-08-27. Price and availability subject to change.
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