PRIME B550-Plus Spec and Price in the United States
An ATX AM4 board on the AMD B550 chipset with a single PCIe 4.0 x16 slot and two M.2 slots. Four DDR4 DIMM slots hold up to 128GB, and it carries six SATA ports. There is no onboard Wi-Fi or rear USB Type-C, and networking is Gigabit Ethernet.
Tied 34th of 1869 models in the Motherboards catalog on RAM slots — 1241 models share this figure. Tied 792nd of 1869 models in the Motherboards catalog on Max memory — 720 models share this figure.
Prices exclude sales tax.
The last tracked price for PRIME B550-Plus in the United States was $128.99 at Newegg, captured 2026-10-08. Across 2 tracked merchants and 165 days of recorded prices, the 90-day median for PRIME B550-Plus is $186.20 and the lowest recorded price is $99.99. This site began capturing prices on July 30, 2026; for Amazon listings, prices dated earlier come from Keepa's price history.
Captured periodically and may have changed.
- PRIME B550-Plus
Each point is one day's recorded price, not a list price. Points dated before July 30, 2026, when this site began capturing prices, come from Keepa's Amazon price history. How we track prices
Specifications
- Socket
- AM4
- Chipset
- B550
- Form factor
- ATX
- Memory type
- DDR4
- RAM slots
- 4
- Max memory
- 128 GB
- M.2 slots
- 2
- PCIe x16 slots
- 1
- PCIe version
- 4.0
- SATA ports
- 6
- LAN speed
- 1 GbE
- Wi-Fi
- No
Guides for this category
Sources
Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.