The best memory upgrades for your Dell Optiplex GX1P 400 M Desktop!
We've spent years amassing all the information we need to make sure you get the right memory for your Dell Optiplex GX1P 400 M Desktop.
We guarantee this memory will work in your machine for the life of your machine. Your Dell Optiplex GX1P 400 M supports up to 768 MB in three slots and modules must be installed one at a time.