AddOn 2GB DDR2-667MHz SODIMM for Lenovo 73P3847 - DDR2 - 2 GB - SO-DIMM 200-pin - 667 MHz / PC2-5300 - 1.8 V - unbuffered - non-ECC - for Lenovo ThinkPad R60; R60e; T60; T60p; X60; X60 Tablet; X60s; Z61e; Z61m; Z61p; Z61t.