Toshiba Portege 4005 User Guide - Page 60

60 Connecting Other External Devices Adding memory Since your computer was built to order, it should have enough memory to run your current applications. However, if your requirements change, you can install extra memory up to a maximum of 512 MB. Memory module sizes Additional memory is easy to install. Memory modules come in the following sizes:
128 MB PC133 SDRAM
256 MB PC133 SDRAM The computer has two memory expansion slots. The following table shows the possible memory configurations: Total Memory 128 MB 256 MB 384 MB 512 MB Memory Module Size Memory Module Size (slot A) (slot B) 128 MB none 256 MB none 128 MB 128 MB 256 MB 128 MB 128 MB 256 MB 256 MB 256 MB Installing a memory module Additional memory modules can be installed in the memory expansion slots under your computer's keyboard. You will need a standard Phillips no.1 screwdriver and a small flat head screwdriver for this procedure. CAUTION: To avoid damaging the computer's screws, use a standard Phillips no. 1 screwdriver that is in good condition.