The **MV64T2AG-R** is a specific part number typically associated with **DRAM Memory Modules**, specifically those manufactured by companies like **Micron** or secondary distributors/rebranders using standardized naming conventions. Based on the alphanumeric coding, this part falls under the category of **DDR2 SDRAM (VLP-RDIMM)** memory. --- ### 1. Technical Specifications Below is a breakdown of the electronic characteristics typically associated with this part number: | Feature | Specification | | :--- | :--- | | **Memory Type** | DDR2 SDRAM | | **Module Type** | RDIMM (Registered Dual In-Line Memory Module) | | **Form Factor** | VLP (Very Low Profile) | | **Capacity** | 2GB | | **Data Rate** | 667 MT/s or 800 MT/s (PC2-5300 or PC2-6400) | | **Voltage** | 1.8V | | **Error Correction** | ECC (Error Correction Code) | | **Pin Count** | 240-pin | --- ### 2. Key Components & Architecture #### A. The DRAM Chips The module is populated with individual DDR2 integrated circuits (ICs). These chips use a **double data rate** architecture to transfer data on both the rising and falling edges of the clock signal. #### B. The Register (Buffer) As a "Registered" DIMM, the module includes a hardware register. This chip acts as a buffer for the address and control signals, reducing the electrical load on the memory controller. This allows for: * Increased system stability. * Support for a higher number of memory modules in a single server. #### C. The SPD EEPROM The board contains a small **Serial Presence Detect (SPD)** chip. This is an $I^2C$ EEPROM that stores the module’s timing parameters, manufacturer ID, and serial number, allowing the BIOS to configure the memory controller automatically. --- ### 3. Physical Form Factor (VLP) The **VLP (Very Low Profile)** designation is critical for specific electronic environments: * **Height:** Usually around 18.3 mm (compared to standard 30 mm). * **Application:** Used in **Blade Servers** and **1U Rackmount units** where vertical space is limited and airflow is crucial. --- ### 4. Part Number Breakdown (Generic Mapping) While part numbers can vary slightly by vendor, the code generally breaks down as follows: * **MV:** Brand/Manufacturer prefix (often Micron-based). * **64:** Density/Architecture indicator. * **T:** Technology (DDR2). * **2AG:** Specific revision and configuration. * **-R:** Denotes "Registered" (RDIMM). ---