Actica ACT2GFR72K8G800S 2GB DDR2-800MHz FB-DIMM 2Rx4 CL6 Memory

Product Description

The Actica ACT2GFR72K8G800S is a 2 Gigabyte memory module utilizing DDR2 SDRAM technology, specifically designed in the FB-DIMM (Fully Buffered DIMM) form factor. FB-DIMMs were prevalent in server and workstation platforms that required high memory bandwidth and advanced memory management features. This module operates at a clock speed of 800MHz, corresponding to a PC2-6400 designation, and features a CAS Latency (CL) of 6. The 2Rx4 configuration indicates that the module is dual-ranked and uses x4 (4-bit) memory chips, which can offer performance benefits in certain memory controller architectures. The key characteristic of FB-DIMMs is the Advanced Memory Buffer (AMB) chip present on each module. This buffer chip serializes and deserializes data between the memory controller and the DRAM chips, effectively decoupling the memory bus speed from the DRAM speed. This allows for higher clock frequencies and greater memory capacities than were possible with traditional unbuffered DIMMs (UDIMMs) or registered DIMMs (RDIMMs) of the same DDR generation. However, FB-DIMMs also consume more power and generate more heat due to the AMB chip. This specific module, with its 2GB capacity, 800MHz speed, and CL6 timing, was a common component in servers and high-end workstations from the mid-2000s. It is crucial for system stability and performance, providing the working memory space for the operating system and applications. The ACT2GFR72K8G800S part number precisely identifies this memory module for compatibility checks within specific server models that support DDR2 FB-DIMMs.