Sun X6991A 128MB 133MHz PC133 168-Pin DIMM Memory

Product Description

The Sun X6991A is a 128MB memory module based on SDRAM (Synchronous Dynamic Random-Access Memory) technology. Operating at a speed of 133MHz, which corresponds to the PC133 standard, this DIMM was commonly used in computer systems from the late 1990s and early 2000s. The module features a standard 168-pin interface, making it compatible with motherboards designed for this form factor, typically found in older servers, workstations, and high-end desktop computers of that era. SDRAM offers synchronous operation, meaning it synchronizes with the system clock, providing more predictable timing and higher performance compared to asynchronous DRAM. The 133MHz speed was considered fast for its time, enabling quicker data access for applications and the operating system. With a capacity of 128MB, this module would have been used to augment the memory of systems that often came with much smaller amounts of RAM, such as 32MB or 64MB. This particular memory module is likely a standard unbuffered DIMM and may not support ECC (Error-Correcting Code) functionality, which became more prevalent in server-grade memory in later generations. It is suitable for maintaining or upgrading older Sun systems or other compatible hardware that requires PC133 SDRAM. Its primary use case is for systems where this specific type and speed of memory are required for compatibility and basic functionality.