MSI has refreshed its mid-range motherboard lineup for AMD’s AM5 platform with its “Max” series, headlined by the upgraded 64 MB BIOS chip. The MSI MAG B850 Gaming Plus Max WiFi represents this update, positioning itself as a $260 ATX board with a distinctive white aesthetic and a notable 5G LAN inclusion. This review examines whether these features justify its position in a competitive market segment.
Packaging and First Impressions
The motherboard arrives in familiar silver-colored packaging, now bearing the “Max” designation. Inside, users will find a standard accessory kit including a SATA cable, EZ M.2 Clip II with a removal tool, a WiFi antenna, a 1-to-2 EZ Conn-Cable for combining fan and RGB connections, a front panel cable, and cable stickers. The package lacks some convenience items found on higher-tier MSI boards, such as the more comprehensive EZ front panel cable or a 1-to-3 connector cable, reflecting its budget-conscious positioning.
Design and Aesthetic Appeal
MSI has made a significant visual departure from the original model. Where the non-Max version featured a black PCB with white heatsinks, the Max variant employs a white PCB and matching white heatsinks adorned with subtle black diagonal lines. This creates a more cohesive and premium look, particularly appealing for builders crafting white-themed systems. The board maintains a clean appearance with no integrated RGB lighting, relying instead on its monochromatic scheme and the shapes printed on the heatsinks for visual detail.
Build Quality and Core Features
The motherboard is constructed on a 6-layer PCB with 2oz copper, utilizing what MSI calls “PCB Fabric Technology” to minimize signal loss. It incorporates standard protections against overvoltage and overcurrent, along with copper rings designed to suppress electromagnetic interference. A notable technical addition is the external clock generator (BCLK controller), which provides separate adjustment of CPU and memory clocks for enhanced overclocking flexibility without disrupting other system timings.
Power Delivery and CPU Support
The B850 Gaming Plus Max WiFi uses the AM5 (LGA1718) socket and supports AMD Ryzen 7000, 8000, and 9000 series processors out of the box. Power is delivered through a 12+2+1 phase design (VCore + SOC + MISC), with each phase rated for 50 amps. Notably, this setup employs discrete MOSFETs from Sinpower (SM4337 high-side and SM4503 low-side), controlled by Richtek RT3672EE and RT3678BE PWM controllers, rather than the more modern and efficient DrMOS or SPS designs common at this price point.
Power Connectors and Cooling
Initial power comes from dual 8-pin EPS connectors using MSI’s solid-pin design, theoretically capable of delivering up to 300W. The VRM heatsinks feature a stacked fin design with 7W/mK thermal pads but lack a connecting heatpipe. This configuration, combined with the discrete MOSFETs, suggests limited overclocking headroom and potentially higher operating temperatures under sustained loads.
Memory and Expansion Capabilities
The board provides four DDR5 DIMM slots supporting up to 256GB of memory. Officially, it supports speeds up to 8200+ MT/s in a 1 DIMM per channel, single-rank configuration. Practical support varies: 6400+ MT/s for 1DPC 2R or 2DPC 1R, and 6000 MT/s for 2DPC 2R. The board does not support ECC RAM and only supports CUDIMMs in clock driver bypass mode, negating their primary speed advantage.
PCIe and Storage Configuration
For expansion, the motherboard offers one full-speed PCIe 5.0 x16 slot with an EZ PCIe release button, though it lacks steel reinforcement. Secondary slots include one PCIe 4.0 x4 and two PCIe 3.0 x1 slots, with the latter three sharing bandwidth. Storage options are generous, featuring three M.2 slots: one PCIe 5.0 x4, one PCIe 4.0 x4, and one PCIe 4.0 x2. These are complemented by four SATA 6Gbps ports. Only the primary Gen5 M.2 slot includes a heatsink with an EZ release mechanism; users must provide their own cooling for drives in the other slots.
Connectivity and Network Features
Connectivity is a mixed bag. The rear I/O includes a Clear CMOS button, a Flash BIOS button, and a total of 17 USB ports. This comprises four USB 2.0 ports, one USB 5Gbps Type-A, one USB 10Gbps Type-A, two USB 10Gbps Type-C ports, and additional front-panel options. The absence of USB4 or even 20Gbps USB is a notable omission for a $260 board.
Networking and Audio
The networking suite is where the board shines, featuring a Realtek RTL8126 5G LAN controller—a rarity at this price—alongside WiFi 7 and Bluetooth 5.4 support (requiring Windows 11 24H2). The audio solution is less impressive, utilizing the older Realtek ALC897 codec instead of newer alternatives like the ALC4080. MSI’s “Audio Boost” technology aims to enhance quality through dedicated PCB layers and high-quality capacitors.
Internal Connectors and Quality-of-Life Features
The board is well-equipped with internal headers, including multiple fan connectors, addressable and standard RGB headers, a TPM header, and a unique Direct OC Jumper for BCLK adjustments via the operating system. An extra 8-pin PCIe power connector supports the ATX 3.1 standard, providing additional power headroom for graphics cards. Four debug LEDs aid troubleshooting, though a more detailed debug code display is absent. The Nuvoton NCT-6687D-R controller handles system monitoring and fan control.
Performance Analysis
Testing with an AMD Ryzen 9 9950X, DDR5-6000 memory, and an RTX 4090 revealed performance squarely in line with expectations for the B850 chipset. In synthetic benchmarks like Blender, Cinebench 2024, Corona 11, Geekbench 6, and V-Ray, the board delivered results typical for the platform. Gaming performance in titles like Cyberpunk 2077, Far Cry 6, and Starfield was also consistent, showing no bottlenecks introduced by the motherboard itself.
Power and Thermal Characteristics
Power consumption measured 105W at idle, 112W during gaming, and 355W under full multi-core load in Cinebench 2024. VRM temperatures peaked at 64°C during stress testing, which is warmer than some competing offerings and aligns with concerns about the discrete MOSFET design. Boot times were respectable at 22 seconds with a Windows 11 23H2 installation.
Market Position and Value Proposition
The MSI MAG B850 Gaming Plus Max WiFi occupies a challenging position. Its $260 MSRP places it against formidable competition, including MSI’s own B850 Tomahawk Max WiFi and various ASRock models. The board’s primary differentiators are its cohesive white aesthetic, the inclusion of 5G LAN, and several quality-of-life features like the EZ M.2 clips and PCIe release button.
Ideal User Profile
This motherboard makes the most sense for builders prioritizing a specific visual theme. Its all-white design with black accents is genuinely attractive for monochromatic builds. The 5G LAN is a legitimate boon for users with capable internet connections, and the external BCLK generator offers a niche overclocking advantage. The overall I/O selection, while lacking in cutting-edge USB speeds, is sufficient for most mainstream users.
However, the value equation falters when examining the core components. The discrete power delivery system feels out of place at this price, contributing to higher VRM temperatures and limiting overclocking potential. The older ALC897 audio codec and the lack of high-speed USB (20Gbps or USB4) are tangible compromises. For users focused solely on performance per dollar, several alternatives offer more robust VRMs, better audio, or more forward-looking connectivity at a similar or lower cost. The board ultimately succeeds as a specialized component for aesthetic-driven builds but struggles to justify its price through technical prowess alone in a market segment where every dollar counts.
