The Kingston ValueRAM KVR-PC2100DDR 256MB Memory RAM is a DDR1 SDRAM module with a total capacity of 256MB, divided into one module. It has a form factor of DIMM, 184 pins, and a bus speed of PC2100 (DDR-266). This memory RAM is ideal for enhancing the performance of computers, particularly for those still using DDR1 technology. Made by Kingston, a trusted brand in the industry, this memory module is designed and manufactured in the United States, ensuring quality and reliability for your computer's memory needs.