The **M2AS1-5423-R2/CE** is a high-performance, enterprise-grade server motherboard manufactured by **Supermicro**. It is specifically designed for the **NVIDIA GH200 Grace Hopper™ Superchip** architecture. --- ### 1. Core Component: NVIDIA GH200 Grace Hopper™ Unlike traditional motherboards that use separate CPU and GPU sockets, this board integrates the Grace Hopper Superchip: * **CPU:** NVIDIA Grace CPU (72-core Arm® Neoverse V2). * **GPU:** NVIDIA H100 Tensor Core GPU. * **Interconnect:** Uses **NVIDIA NVLink-C2C**, providing a 900 GB/s coherent interface between the CPU and GPU. This allows the GPU to access the CPU's memory directly and vice-versa. ### 2. Key Electronic Specifications | Feature | Specification | | :--- | :--- | | **Form Factor** | Proprietary (Optimized for MGX 2U/4U Chassis) | | **Memory Support** | Up to 480GB LPDDR5X (On-package) | | **Expansion Slots** | Multiple PCIe 5.0 x16 slots (via Riser cards) | | **Storage** | M.2 NVMe (PCIe 5.0 x4) support | | **Networking** | Integrated IPMI 2.0 with dedicated LAN | | **Power Input** | High-density DC-to-DC converters for Superchip stability | --- ### 3. Critical Electronic Subsystems #### A. Power Delivery Network (VRMs) Because the GH200 can draw significant wattage (up to 1000W TDP for the module), the motherboard features a massive **Voltage Regulator Module (VRM)** section. These components convert high-voltage DC from the power supply into the precise, low-voltage, high-current power required by the ARM cores and H100 logic. #### B. Management Controller (BMC) The board includes an **ASPEED AST2600 BMC**. This is a dedicated processor that allows administrators to: * Monitor thermals and voltages. * Perform remote power cycling. * Access the "KVM over IP" for OS installation without physical access. #### C. High-Speed I/O The "R2" revision typically denotes enhancements in signal integrity for **PCIe Gen 5**. This involves the use of "retimers" and "redrivers" on the PCB—electronic parts that clean up high-frequency signals to prevent data corruption over the physical traces of the board. --- ### 4. Connectivity and Ports * **Internal Headers:** Support for USB 3.2, TPM (Trusted Platform Module), and specialized cooling fan headers. * **External I/O:** VGA port (via BMC), USB ports, and a dedicated RJ45 Management port.