SimpleTech STG4600/512 512MB PC800 Non-ECC RDRAM 184pin RIMM 2-Piece Kit Provides the ability to get the most out of your high end motherboard or computer system Delivers a wicked fast gaming experience, arguably the fastest Maintains a transfer rate of up to 3.2GB of data per second Achievable front side bus speeds of 800MHz per second Highest quality assurance rating available - ISO9001 Certified