GIGABYTE has unveiled its new and peculiar AM5 motherboard, the B850M AORUS STEALTH ICE. This is not to be confused with its ATX sibling or models like the M FORCE. This new offering represents an interesting and novel combination. The manual confirms it’s a new model, measuring 24.4 x 24.4 cm in Micro ATX format, featuring the AMD B850 chipset, AM5 socket, and a Back-Connect layout that routes a significant portion of the cabling to the rear of the PCB, without being a full BTX standard.
What makes this board stand out, beyond its white aesthetic and AORUS STEALTH family affiliation, is its compact design. GIGABYTE has ingeniously integrated rear connectors, 3 M.2 slots, Wi-Fi 7, 5GbE LAN, and support for Ryzen 9000, 8000, and 7000 series processors into this compact Back-Connect board.
GIGABYTE B850M AORUS STEALTH ICE: The First M-ATX Back-Connect Motherboard from GIGABYTE
While not adhering to the full ASUS BTX standard, this board incorporates many of its desirable features. This makes the model particularly unique, bringing a hybrid approach to the market with many user-requested innovations without the full complexities and compatibility limitations often associated with BTX.
Technically, the front view of the board is remarkably clean. It houses the AM5 socket, four DDR5 slots, a PCIEX16 slot, the AMD B850 chipset, the M.2 Wi-Fi module, the CMOS battery, the audio codec, three M.2 slots, and diagnostic LEDs for CPU, DRAM, VGA, and BOOT.
Notably, the diagnostic LEDs are covered by a shroud, presumably for aesthetic purposes and only intended to be visible from the side or accessed in case of a system failure. The board shares its manual with the B850M AORUS STEALTH (the non-ICE version), suggesting their hardware specifications are nearly identical.
Rear Connector Placement Highlights the Sector’s Shift Towards BTX Standards
The most striking aspect is the rear view presented in the manual. Here, you’ll find the 24-pin ATX power connector, the 12V_2X4 CPU power connector, CPU_FAN, CPU_OPT, SYS_FAN1, FAN2_PUMP, SATA connectors, F_PANEL, F_AUDIO, internal USB headers, SPI_TPM, ARGB and RGB headers, and the CLR_RST jumper. This means almost all primary connections are located on the back of the motherboard, a significant departure from traditional boards where these would be on the front or bottom edges, leading to more visible cable clutter.
For storage, the B850M AORUS STEALTH ICE is equipped with 3 M.2 slots, an impressive feat for its size. The M2A_CPU slot, the primary M.2 slot, is directly connected to the CPU and supports PCIe 5.0 x4/x2 with Ryzen 9000 and Ryzen 7000 series processors. The M2B_CPU slot also connects to the CPU but is limited to PCIe 4.0. The M2C_SB slot, connected to the chipset, supports PCIe 4.0 x4/x2. Additionally, there are 2 x SATA 6 Gb/s ports and support for NVMe and SATA RAID configurations, with RAID 5 limited to Ryzen 9000 processors.
Connectivity is also robust, featuring a Realtek 5GbE LAN controller, Wi-Fi 7 (Realtek RTL8922AE), Bluetooth 5.4, Realtek ALC1220 audio codec, HDMI 2.1 (supporting up to 4096 x 2160 @ 60 Hz), and DisplayPort 1.4 (supporting up to 3840 x 2160 @ 144 Hz), with specific performance dependent on the installed CPU.
The key challenge with this Back-Connect design is physical compatibility. It requires a case specifically designed to accommodate rear-mounted connectors, ideally a full BTX enclosure. While the motherboard retains the Micro ATX form factor, its assembly, cabling, and visual presentation within a PC build are significantly altered, though some traditional elements like the graphics card power delivery remain conventional.
