The Samsung M395T5160CZ4-CE66 DDR2 Fully Buffered DIMM (FBDIMM) is a memory module designed to meet the exigencies of high-performance servers and workstations. With a 4GB capacity and operating at a speed of DDR2-667MHz, it is engineered to bolster system responsiveness and handling of memory-intensive applications. This 240-pin module utilizes Samsung's 256Mx4 36C technology, ensuring efficient data handling and enhanced performance reliability. The FBDIMM architecture includes an Advanced Memory Buffer (AMB), significantly improving signal integrity and memory access reliability, crucial for systems demanding high uptime and stability. The 2Rx4 configuration indicates a dual-rank design, optimal for achieving high-density memory setups without compromising system stability. This memory module provides a perfect upgrade solution, offering exceptional performance and reliability for legacy systems requiring DDR2 technology.