- Dual PCIe 5.0 x4 M.2 storage slots paired with a primary PCIe 5.0 x16 graphics expansion slot
- High-speed networking with Realtek 2.5GbE Ethernet and MediaTek MT7922 Wi-Fi 6E / Bluetooth 5.2
- Memory scalability supporting up to 192 GB DDR5 with AMD EXPO profiles up to 8000 MHz (OC)
- Dual 8-pin 12V CPU power connectors and dual USB 10Gbps Type-C interfaces across front and rear I/O
- Rear HDMI port is restricted to the legacy HDMI 1.4 standard (maximum 4K at 30Hz)
- Tertiary M.2 slot (M.2_C) is limited to PCIe 4.0 x2 bandwidth
- Audio subsystem is built around an entry-level Realtek ALC897 codec
Overview
High-speed bus allocation defines the architectural layout of the MAXSUN MS-Terminator B850M PRO WiFi, routing PCIe 5.0 signaling across both the primary x16 expansion slot and two dedicated M.2 2280 sockets. Operating on AMD’s B850 chipset with an AM5 socket, the board provides multi-generational processor compatibility spanning Ryzen 7000, 8000, and 9000 series CPUs. Power delivery to the socket is routed through dual 8-pin +12V EPS power connectors alongside a standard 24-pin ATX connector, ensuring stable current distribution during heavy multi-core loads. Memory topology incorporates four DDR5 DIMM slots arranged in dual-channel configuration, scaling up to a 192 GB maximum capacity and validating AMD EXPO overclocking profiles up to 8000 MHz.
Constructed within standard Micro ATX dimensions measuring 9.6 x 9.6 in (245 x 245 mm), the physical PCB integrates dedicated passive heatsinks over critical high-heat zones and provides four 4-pin PWM headers—designated for CPU_FAN, dedicated water cooling PUMP, and two chassis SYS_FAN connections—allowing builders to orchestrate comprehensive thermal profiles. Peripheral I/O distribution includes dual USB 10Gbps Type-C interfaces split between the rear panel and an internal front-panel header, supplemented by four USB 5Gbps Type-A and four USB 2.0 ports at the rear. Networking is governed by a Realtek RTL8125D 2.5GbE Ethernet controller and an integrated MediaTek MT7922 module delivering Wi-Fi 6E and Bluetooth 5.2 wireless operation.
The board’s cost-optimized architecture introduces notable design compromises that define its everyday operational envelope. While display output over DisplayPort supports 4K at 60Hz, the rear HDMI port is restricted to the legacy HDMI 1.4 standard, capping video output at 4K at 30Hz for users relying on integrated processor graphics. Furthermore, while the primary two M.2 sockets support full PCIe 5.0 speeds, the tertiary M.2_C slot operates at a constrained PCIe 4.0 x2 bandwidth link. Onboard audio is driven by an entry-level Realtek ALC897 codec, catering to standard analog output rather than high-fidelity headphone amplification. For platform maintenance and overclocking recovery, MAXSUN incorporates a dedicated physical CLR_CMOS quick-access button, simplifying BIOS reset routines when tuning high-frequency memory kits.
Technical Specifications
| Brand | MAXSUN |
| Model | MS-Terminator B850M PRO WiFi |
| Form Factor | Micro ATX (9.6 x 9.6 in / 245 x 245 mm) |
| Cpu Socket | AMD AM5 |
| Supported Processors | AMD Ryzen 7000, 8000, and 9000 Series |
| Chipset | AMD B850 |
| Memory Slots | 4× DDR5 DIMM |
| Max Memory Capacity | 192 GB |
| Memory Architecture | Dual-channel |
| Memory Overclocking Support | AMD EXPO (up to 8000 MHz OC) |
| Pcie Slots | 1× PCIe 5.0 x16, 1× PCIe 4.0 x16 (x4 mode) |
| M2 Storage Slots | 3× M.2 2280 Key M (M.2_A: PCIe 5.0 x4/x2, M.2_B: PCIe 5.0 x4/x2, M.2_C: PCIe 4.0 x2) |
| Display Outputs | 1× DisplayPort (up to 4K @ 60Hz), 1× HDMI 1.4 (up to 4K @ 30Hz) |
| Audio Codec | Realtek ALC897 |
| Ethernet | 1× Realtek RTL8125D 2.5GbE LAN |
| Wireless Module | MediaTek MT7922 (Wi-Fi 6E, Bluetooth 5.2) |
| Rear Usb Ports | 1× USB 10Gbps Type-C, 4× USB 5Gbps Type-A, 4× USB 2.0 Type-A |
| Front Internal Usb Headers | 1× USB 10Gbps Type-C, 1× USB 5Gbps 19-pin (supports 2 ports), 2× USB 2.0 9-pin (supports 4 ports) |
| Power Connectors | 1× 24-pin ATX power connector, 2× 8-pin +12V CPU power connectors |
| Fan And Pump Headers | 1× 4-pin CPU_FAN, 1× 4-pin PUMP, 2× 4-pin SYS_FAN |
| Rgb Headers | 2× 3-pin 5V ARGB |
| Buttons | 1× CLR_CMOS quick-access button |
Primary Sources & Audited Citations
Recommended Alternatives in Motherboards
At a Glance
How reliable is the MAXSUN MS-Terminator B850M PRO WiFi Review: Dual Gen5 Storage on Micro-ATX according to Mizex audits?
An attractive, bandwidth-rich AM5 motherboard for builders prioritizing high-speed Gen5 storage and multi-generation Ryzen support, provided they rely on DisplayPort or a dedicated GPU rather than the legacy HDMI port.
What are the known quirks or drawbacks of the MAXSUN MS-Terminator B850M PRO WiFi Review: Dual Gen5 Storage on Micro-ATX?
Our reliability audit identified the following documented caveats:
- Rear HDMI port is restricted to the legacy HDMI 1.4 standard (maximum 4K at 30Hz)
- Tertiary M.2 slot (M.2_C) is limited to PCIe 4.0 x2 bandwidth
- Audio subsystem is built around an entry-level Realtek ALC897 codec
What are the key engineering highlights of the MAXSUN MS-Terminator B850M PRO WiFi Review: Dual Gen5 Storage on Micro-ATX?
The top strengths recorded in our evaluation include:
- Dual PCIe 5.0 x4 M.2 storage slots paired with a primary PCIe 5.0 x16 graphics expansion slot
- High-speed networking with Realtek 2.5GbE Ethernet and MediaTek MT7922 Wi-Fi 6E / Bluetooth 5.2
- Memory scalability supporting up to 192 GB DDR5 with AMD EXPO profiles up to 8000 MHz (OC)
- Dual 8-pin 12V CPU power connectors and dual USB 10Gbps Type-C interfaces across front and rear I/O