The part number **16R2656-R** typically refers to a high-density, low-profile memory module, specifically an **IBM/Lenovo 1GB DDR2 Server Memory Stick**. These are commonly used in legacy enterprise hardware like System x servers and IntelliStation workstations. --- ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | IBM / Lenovo (OEM by Samsung, Micron, or Hynix) | | **Memory Type** | DDR2 SDRAM | | **Capacity** | 1 GB | | **Speed** | PC2-5300 (667 MHz) | | **Pins** | 240-Pin DIMM | | **Error Correction** | ECC (Error Correcting Code) | | **Buffering** | Fully Buffered (FBDIMM) | | **Voltage** | 1.8V | | **Rank** | Single Rank or Dual Rank (Configuration dependent) | --- ### Key Component Details #### 1. Fully Buffered (FBDIMM) Technology The suffix or internal architecture of this part uses an **AMB (Advanced Memory Buffer)**. Unlike standard desktop RAM, FBDIMMs use a serial interface to reduce the number of traces on the motherboard, allowing for higher capacities and better stability in server environments. #### 2. ECC (Error Correcting Code) The "R" or server designation indicates that this part can detect and fix single-bit memory errors. This is critical for servers that run 24/7 to prevent system crashes and data corruption. #### 3. Thermal Management Since FBDIMMs generate significant heat due to the AMB chip, the **16R2656-R** usually comes equipped with a metallic heat spreader (heat sink) to maintain stable operating temperatures. --- ### Common Applications This part is primarily used as a replacement or upgrade for legacy IBM systems, including: * **IBM System x3400 / x3500 / x3550 / x3650** * **IBM BladeCenter HS21** * **IBM IntelliStation Z Pro (Type 9228)** ### Summary of Pros and Cons * **Pros:** High reliability, error correction, and high-speed data integrity for enterprise tasks. * **Cons:** Higher power consumption and heat output compared to standard DDR2; incompatible with standard consumer motherboards.