AOpen DX6G Plus Manual page 16

1.7 Memory Upgrade
The four 168-pin sockets onboard support SDRAM-type DIMMs. You
may install 16-MB, 32-MB, 64-MB, 128-, 256-, or 512-MB (single and
double density) DIMMs for a maximum of 2048-MB system memory.
The SDRAM DIMMs should work under 3.3 volts only; 5 volt memory
devices are not supported. DX6G Plus supports both 100MHz
standard and registered SDRAM. However, please do not use them at
the same time.
Do not use both 66 MHz (unbuffered) and
100 MHz (registered) SDRAM together. This
might 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.
1.7.1 Memory Configurations
The table below lists some system memory configurations. You may
combine DIMMs with various capacities to form other combinations.
DIMM1 DIMM2
32 MB
32 MB 32 MB
32 MB 32 MB
32 MB 32 MB
64 MB
64 MB 64 MB
64 MB 64 MB
64 MB 64 MB
128 MB
128 MB 128 MB
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DIMM3 DIMM4
32 MB
32 MB 32 MB
64 MB
64 MB 64 MB
Total Memory
32 MB
64 MB
96 MB
128 MB
64 MB
128 MB
192 MB
256 MB
128 MB
256 MB
User's Guide