SimpleTech SVM-DDR2100/512 512MB PC2100 DDR 184pin DIMM Twice as fast as standard SDRAM memory Delivers a wicked fast gaming experience and enhanced performance for all advanced computer processing Specifically designed for use in systems requiring a 100MHz or 133MHz front-side bus or an effective front-side bus speed of 266MHz Maintains a transfer rate of up to 2.1GB of data per second Highest quality assurance rating available - ISO9001 Certified