G.SKILL 4GB (2 x 2GB) 200-Pin SO-DIMM DDR2 667 (PC2 5300) Dual Channel Kit Laptop Memory with Heat Sinks Model F2-5300CL5D-4GBSK 4GB DDR2 667MHz laptop memory upgrade kit 2x 2GB PC2-5300 memory modules CL5, 200 pins, 1.8V With aluminium heatsinks Lifetime warranty