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ASRock

B450M Steel Legend Spec and Price in the United States

AM4B450

A Micro-ATX AM4 board on the AMD B450 chipset with six x16 slots and two M.2 slots. Four DDR4 DIMM slots hold up to 128GB, and it carries four SATA ports and one rear USB Type-C port. Networking is 1 Gigabit Ethernet with no onboard Wi-Fi.

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.

Current best price
$152.31at Newegg · captured 2026-09-15View at Newegg

Captured periodically and may have changed.

Price history

30D90D180DAll
  • B450M Steel Legend
August 24, 20264 capturestoday · $147.20

Each point is one capture, not a list price. How we track prices

Specifications

Socket
AM4
Chipset
B450
Form factor
Micro-ATX
Memory type
DDR4
RAM slots
4
Max memory
128 GB
M.2 slots
2
PCIe x16 slots
6
SATA ports
4
LAN speed
1 GbE
USB-C ports
1
Wi-Fi
No

Guides for this category

How to choose a motherboardThe socket decides which processor goes in; chipset, form factor, memory support and the slot counts decide whether the rest of the build fits around it.

Sources

Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.