The NCP NC4377 128MB PC133 168 PIN DIMM SDRAM memory module is a set of two 128MB SDRAM modules designed for computers that support PC-133 bus speed. These modules offer a total capacity of 128MB and are ideal for adding more memory to your system for improved performance. With its ECC memory feature, this RAM is specifically designed for error correction, ensuring reliable and stable operation. Perfect for upgrading your computer's memory capacity, the NCP NC4377 modules provide a cost-effective solution for enhancing your system's performance.