Crucial / 1GB / 240-pin DIMM / DDR2 PC2-5300 / Desktop Memory 1GB DDR2 PC2-5300, 240-pin DIMM memory module / Model no. CT12864AA667 DDR2 PC2-5300, CL=5, Unbuffered, NON-ECC, DDR2-667, 1.8V, 128Meg x 64