Compaq Presario 1800US 900 can be upgraded to a maximum memory of
320 MB , this system has 1 socket to install
Memory and comes already installed with 192 MB = 64 MB (non-removable) + 128 MB (removable) of standard Memory. Compaq Presario 1800US 900 takes PC133 SDRAM SODIMMs . You may choose the following Memory Upgrades.