The **M2AMS2-D4-R** is a specific part number typically associated with **Kingston Technology** server-grade memory modules (DRAM). Specifically, it refers to a **DDR4 SDRAM** module designed for high-performance computing and enterprise server environments. Below is the technical breakdown of its electronic components and specifications. --- ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Memory Type** | DDR4 SDRAM | | **Form Factor** | DIMM (Dual In-line Memory Module) | | **Data Rate** | PC4-2400 (2400 MT/s) or higher (varies by revision) | | **Error Correction** | ECC (Error Correction Code) | | **Module Rank** | Single Rank (1R) or Dual Rank (2R) depending on density | | **Voltage** | 1.2V (Standard DDR4 Low Voltage) | | **Pin Count** | 288-Pin | --- ### 2. Key Electronic Components The module is comprised of several critical integrated circuits (ICs) and discrete components: #### A. DRAM Chips (Memory Die) The core components are the high-density CMOS DRAM chips. These are usually sourced from major manufacturers like SK Hynix, Micron, or Samsung. They store the actual data bits using a capacitor-transistor architecture. #### B. Register/Buffer (RCD) Because the "R" in the suffix usually denotes **Registered (RDIMM)**, the module includes a **Registering Clock Driver (RCD)**. * **Function:** It buffers the command and address signals between the memory controller and the DRAM chips. * **Benefit:** Reduces the electrical load on the system memory controller, allowing for more stable operation with higher capacities. #### C. Serial Presence Detect (SPD) EEPROM A small non-volatile memory chip located on the PCB. * **Function:** It stores information about the module’s timings, voltage, and manufacturer data. The system BIOS reads this chip during boot to configure the memory settings correctly. #### D. Decoupling Capacitors Small surface-mount (SMD) components scattered across the PCB. * **Function:** They filter electrical noise and stabilize the 1.2V power supply to the DRAM chips, preventing data corruption caused by voltage spikes. --- ### 3. Usage Context The "M2AMS" series is frequently utilized in specialized workstations and servers (e.g., systems built by HP, Dell, or Lenovo) where stability is prioritized over overclocking. The **D4** indicates the DDR4 generation, and the **-R** suffix is a standard indicator for Registered memory, which is **not compatible** with standard consumer motherboards that require Unbuffered (UDIMM) memory.