The socket closest to the standard memory will not accept modules of higher than 4MB capacity.
CPU Type
50MHz Intel i486DX2
Model Comments
533MHz FSB
Compaq Presario 650 can be upgraded to a maximum memory of
56 MB , this system has 4 sockets to install
Memory and comes already installed with 4 MB (non-removable) of standard Memory. Compaq Presario 650 takes The socket closest to the standard memory will not accept modules of higher than 4MB capacity. . You may choose the following Memory Upgrades.