Compaq Presario SR1601NX can be upgraded to a maximum memory of
4.0 GB , this system has 4 sockets to install
Memory and comes already installed with 256 MB (removable) of standard Memory. Compaq Presario SR1601NX takes PC3200 DDR SDRAM DIMMs. Supports Dual Channel DDR. . You may choose the following Memory Upgrades.