Memory Type: SDRAM, PC133, SDRAM (non-ECC)
Maximum Memory: 512MB
If the unit shipped with 96MB or more, both upgrade sockets are filled and you will need to remove some memory in order to upgrade.
How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found here.
Memory or DRAM is the "working" memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.
video - installing memory