Upgrade your system with this 1GB DDR-266MHz memory module from Sun. Designed for use with Sun 370-4940 systems, this DIMM module offers reliable and efficient performance to enhance your computing experience. With a bus speed of PC-2100 (DDR-266) and a single module, this memory module is perfect for those who need to increase the capacity of their system without compromising on quality. Whether you are a professional or a casual user, this memory module ensures that your system runs smoothly and efficiently. Its brand, Sun, is known for its quality products and this memory module is no exception. So, upgrade your system today and experience the benefits of enhanced performance.