Acer 500L - Manual (Page 39)

Chapter 2 System Board 2-15
Memory Upgrade
The three 168-pin sockets onboard support SDRAM-type DIMMs only.
You may install 16-MB, 32-MB, 64-MB, or 128-MB DIMMs for a
maximum 384-MB system memory.
The SDRAM DIMMs should work under 3.3 volts; 5-volt memory
devices are not supported. Memory modules with a timing setting of
66 MHz are defined under unbuffered DIMM specifications, while 100
MHz modules are defined under Intel PC-100 SDRAM specifications.
Do not use both 66 MHz (unbuffered) and
100 MHz (registered) SDRAM together. It
could cause your system to malfunction.
Each of the sockets represents one independent bank. This allows
you to install DIMMs with different capacities to form a configuration.
Memory Configurations
The table below lists some system memory configurations. You may
combine DIMMs with various capacities to form other combinations.
Bank 0 Bank 1 Bank 2 Total Memory
16 MB 16 MB
16 MB 16 MB 32 MB
16 MB 16 MB 16 MB 48 MB
32 MB 32 MB
32 MB 32 MB 64 MB
32 MB 32 MB 32 MB 96 MB
64 MB 64 MB
64 MB 64 MB 128 MB
64 MB 64 MB 64 MB 192 MB
128 MB 128 MB