I looked up the specifics for this chip Hynix 1GB Module DDR2 SoDimm 200-Pin PC2-4200 CL=4 non-ECC Unbuffered DDR2-533 128Meg x 64 Mfr P/N HYMP512S64BP8-C4 AB I found the info at http://www.memory4less.com/m4l_itemdetail.aspx?itemId=1446057064&rid=fd_13_2_23_650&gclid=CN6Nhcbz9LACFUXc4AodfHccDQ