The **M400410B2PJ-R** is a specific electronic component, primarily recognized as a high-performance **DDR4 SDRAM memory module** produced by **Samsung**. Below is a detailed breakdown of its specifications, architecture, and electronic characteristics. --- ## 1. Core Specifications This part is a high-density, energy-efficient memory module designed for server and workstation environments. | Feature | Specification | | :--- | :--- | | **Memory Type** | DDR4 SDRAM | | **Form Factor** | RDIMM (Registered DIMM) | | **Capacity** | 32 GB | | **Data Rate** | 2400 MT/s (PC4-2400T) | | **Voltage** | 1.2V (Standard DDR4 Low Voltage) | | **Error Correction** | ECC (Error Correction Code) | | **Rank** | 2Rx4 (Dual Rank) | --- ## 2. Electronic Components & Architecture The module is composed of several key integrated circuits (ICs) that handle data storage, signal integrity, and power management. ### A. The DRAM Chips * **Fabrication:** Built using Samsung’s advanced nanometer process technology. * **Organization:** The "x4" designation indicates that each individual memory chip on the board provides a 4-bit wide data path. * **Refresh Rate:** Operates with standard auto-refresh and self-refresh cycles to maintain data integrity in the capacitors. ### B. The Register (RCD) As an **RDIMM**, this module includes a **Registering Clock Driver (RCD)**. * **Function:** It buffers the address and control signals between the memory controller and the DRAM chips. * **Electronic Benefit:** This reduces the electrical load on the system's memory controller, allowing for higher capacity and stability in multi-DIMM configurations. ### C. EEPROM / SPD (Serial Presence Detect) * **Component:** A small 8-pin chip located on the PCB. * **Function:** It stores the timing parameters, manufacturer data, and voltage requirements. The system BIOS reads this via the I2C/SMBus protocol during startup to configure the memory correctly. --- ## 3. Physical & Electrical Pinout The module utilizes a **288-pin** interface. The pins are gold-plated to ensure high conductivity and resistance to oxidation. ### Key Voltage Rails * **VDD (1.2V):** Main power supply for the DRAM chips. * **VPP (2.5V):** Activation voltage used for the word line of the memory array. * **VDDSPD (2.5V to 3.3V):** Power supply for the SPD EEPROM chip. --- ## 4. Usage Environment Because this is an **ECC Registered** module, it is electronically incompatible with most standard consumer motherboards (which require Unbuffered/Non-ECC RAM). It is designed for: * Enterprise Servers (HP ProLiant, Dell PowerEdge, etc.) * High-end Workstations. * Data centers requiring 24/7 uptime.