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Asus

ASUS ROG Strix B850-G Gaming WiFi AMD AM5 B850 mATX Motherboard

Motherboard

4.7/ 5 on Amazon97Amazon ratings200+bought last month2.7ProductDome score

Better rated than 63%
More reviewed than 69%

Limited evidenceUpdated 8 days agoAmazon data + ProductDome analysis · methodology

Best forYou want an AM5 microATX board with four M.2 slots and WiFi 7 built in.

A well-connected microATX AM5 board, worth it for builders who want DDR5, four M.2 slots and WiFi 7 without moving up to full ATX size.

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ProductDome scorecard

How it ranks among the 16 motherboards we track

2.7/ 5ProductDome scoreLimited evidence

Owner satisfaction · 56% of scorecategory median 4.5★4.7

4.7★ across 97 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 53 ratings2.5

97 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score3.1

200+ bought on Amazon last month.

Data quality · 11% of score1.3

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 16 motherboards we track - how the scorecard works · full motherboards data report. Confidence: limited - incomplete product information.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

A microATX motherboard built for AMD's AM5 platform and B850 chipset, aimed at Ryzen 7000, 8000 and 9000 series builds that want DDR5 memory, WiFi 7 and four M.2 slots in a smaller form factor.

Four M.2 slots on a microATX board is unusual and the headline reason to consider this one: one PCIe 5.0 slot and two PCIe 4.0 slots sit under a shared heatsink, with a fourth PCIe 4.0 slot underneath the board for extra storage without crowding the top side. The 14+2+1 power stage design rated at 80A each is aimed at supporting AMD's higher core-count Ryzen chips rather than just entry-level ones.

AMD AM5 socket, Ryzen 7000/8000/9000 support
Four M.2 slots, one PCIe 5.0 ready
WiFi 7 and 2.5G Ethernet
14+2+1 power stage design

Who it's for

Suits AM5 builders who want a compact board without giving up storage expansion or future WiFi 7 networking. Less relevant for anyone who needs full ATX slot count or is building on an older AM4 platform.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Four M.2 slots including one PCIe 5.0
DDR5 memory support with WiFi 7 and 2.5G LAN
14+2+1 power stages for higher core-count Ryzen chips
DIY-friendly Q-Release latches and Q-LED debugging

What to check first

MicroATX size means fewer expansion slots than full ATX
Full WiFi 7 speed needs Windows 11 24H2 or newer

Performance notes

The 14+2+1 power stage solution with an 8+8-pin ProCool connector is what lets the board feed higher core-count Ryzen processors without cutting corners on stability, and the VRM heatsinks bridged with thermal pads help manage the heat that setup generates. On-board WiFi 7 requires Windows 11 24H2 or later to reach full speed, with older Windows versions capped at WiFi 6E or WiFi 6.

Specifications

Brand	Asus
Model	B850-G

How it compares

This product against the closest alternatives we track in motherboards.

Product	Amazon rating	Ratings	ProductDome score
ASUS ROG Strix B850-G Gaming WiFi AMD AM5 B850 mATX MotherboardThis product	4.7 / 5	97	2.7 / 5
GIGABYTE B550 Eagle WIFI6 AMD AM4 ATX MotherboardGigabyte	4.5 / 5	755	4.2 / 5
Kado M4x14mm Hex Stainless Steel Standoff Spacer Screw Nut Bolt Set 4pcsKado	4.5 / 5	71	4.1 / 5
MSI PRO B850-S WIFI6E MotherboardMSI	4.8 / 5	29	4.0 / 5
ASRock B560M-C Micro-ATX MotherboardASRock	3.9 / 5	11	2.7 / 5

Frequently asked

Questions about the Asus B850-G

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

Does the ASUS ROG Strix B850-G support DDR4?

No, this board is DDR5 only, matching AM5's memory requirement.

How many M.2 slots does it have?

Four total: one PCIe 5.0 M.2 slot and two PCIe 4.0 M.2 slots under a shared heatsink on top, plus a fourth PCIe 4.0 slot on the underside of the board.

Do I need a specific Windows version for WiFi 7?

Full WiFi 7 functionality needs Windows 11 24H2 or later; earlier Windows 11 versions are limited to WiFi 6E and Windows 10 only supports WiFi 6.