ASUS
Prime B450M-K II (Socket AM4/B450/DDR4/S-ATA 600/Micro ATX)
*Price sourced from Amazon.com. Last updated 2026-06-06. Price and availability subject to change.
Bottom line: The Prime B450M-K II (Socket AM4/B450/DDR4/S-ATA 600/Micro ATX) is a solid pick with broad community endorsement in the motherboards category, priced around $98.99, rated 4.5★ across 2,205 verified Amazon reviews. A solid choice — worth comparing against one or two close alternatives first.
ASUS Prime B450 Series motherboards provide the solid foundation needed for your first build, plus flexibility to grow with your ambitions. We've melded all the good stuff that's packed into AMD Ryzen processors with essential ASUS design and engineering, so you benefit from industry-leading technologies — including automated system tuning, comprehensive cooling controls, and immersive onboard audio. When you build with an ASUS Prime B450 Series motherboard, you build smart, easy and affordably.
SpecPicks Verdict
SpecPicks classifies ASUS Prime B450M-K II (Socket AM4/B450/DDR4/S-ATA 600/Micro ATX) as a solid pick with broad community endorsement in the motherboards category, based on 2,205 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. ASUS's positioning sits comfortably above the category median. 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 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
- ✓ Highly rated — 4.5★ average across customer reviews
- ✓ Large, well-vetted feedback pool (2,205 reviews)
- ✓ Comprehensive cooling: PCH heat sink and Xpert fan
- ✓ Backed by ASUS's warranty and support channels
- ✓ 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
- Comprehensive cooling: PCH heat sink and Xpert fan
- Ultra-fast connectivity: M.2 support, 1GB Ethernet and USB 3.2 Gen 1 Type-A
- Ultrafast connectivity: Supreme flexibility with USB 3.1 Gen 2 and native M.2
- ASUS Aura Sync header: Onboard connector for RGB LED strips, easily synced with an ever-growing portfolio of Aura Sync-capable hardware
- 5X Protection III: Multiple hardware safeguards for all-around system protection
Full Specifications
| Brand | ASUS |
|---|---|
| USB 2.0 | 2 |
| Platform | Windows 10, Windows 7 |
| CPU Model | Intel Xeon |
| CPU Socket | Socket AM4 |
| Model Name | Prime B450M-A |
| Chipset Type | AMD B450 |
| Connectivity | USB |
| Model Number | 90MB0YR0-M0EAY0 |
| Item Type Name | ASUS PRIME B450M-A (Socket AM4/B450/DDR4/S-ATA 600/Micro ATX) |
| Mfr Part Number | PRIME B450M-A |
| Number of Ports | 12 |
| Total Usb Ports | 8 |
| Processor Socket | Socket AM4 |
Ready to buy?
ASUS Prime B450M-K II (Socket AM4/B450/DDR4/S-ATA 600/Micro ATX) 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 2026-06-06. Price and availability subject to change.
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