IBM 00L3493 2GB PC2-6400U-666 DIMM POS 743

Product Description

The IBM 00L3493 is a 2GB DDR2 SDRAM DIMM memory module, specified with a PC2-6400 speed rating, which corresponds to an 800MHz operational frequency. The 'U' in PC2-6400U typically denotes an Unbuffered DIMM (UDIMM), meaning it is intended for standard desktop computers and some workstations, rather than servers which often use Registered DIMMs (RDIMMs). The '666' in the part number likely refers to the CAS Latency (CL) of 6, indicating the number of clock cycles required for the memory to respond to a column access command. This module is designed for systems that utilize DDR2 memory technology. DDR2 offered improvements in speed and power efficiency over the original DDR standard. The 2GB capacity was a common size for memory modules during the DDR2 era, allowing for reasonable multitasking performance in consumer and business PCs. The 'POS' designation in the title suggests it may have been specifically tested or marketed for Point of Sale systems, which often require reliable and specific hardware configurations. As an Unbuffered DIMM, it directly interfaces with the memory controller without an intermediate register. This makes it suitable for systems where the number of memory modules is not excessively high. The IBM 00L3493 is a component for systems that require DDR2 memory, and it is crucial to ensure compatibility with the motherboard's specifications before installation, as DDR2 is not interchangeable with newer DDR generations.