Kingston Technology ValueRAM 1 GB Dual Rank Desktop Memory 1 Single (Not a kit) DDR 266 MHz (PC 2100) 184-Pin DDR SDRAM KVR266X72RC25/1GD One 1GB module of 266MHz DDR Desktop Memory Specifically designed and tested for compatibility in various makes and models of desktop computers From the industry leader in PC memory Backed by a lifetime warranty and free technical support