SimpleTech STD2514/256 256MB PC800 ECC RDRAM 184pin RIMM Viable alternative to Dell memory part 311-0903 Guaranteed to be as good or better than the memory that came originally with your Dell computer Specifically designed and engineered to follow Dell's stringent memory specifications, then tested with Dell products to guarantee compatibility Achievable front side bus speeds of 800MHz per second and a transfer rate of up to 3.2GB of data per second Highest quality assurance rating available - ISO9001 Certified