Compaq Presario s4000T can be upgraded to a maximum memory of
4.0 GB , this system has 4 sockets (2 banks of 2) to install
Memory and comes already installed with 512 MB = 256 MB (removable) + 256 MB (removable) of standard Memory. Compaq Presario s4000T takes PC2700/PC3200 DDR SDRAM DIMMs. 533MHz FSB processors require PC2700. 800MHz FSB processors require PC3200. . You may choose the following Memory Upgrades.