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1.8
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. M21A 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.
1.8.1
Memory Configurations
Table 1-3 lists some system memory configurations.
combine DIMMs with various capacities to form other combinations.
Table 1-3
Memory Configurations
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
System Board
DIMM3
DIMM4
32 MB
32 MB
32 MB
64 MB
64 MB
64 MB
You may
Total Memory
32 MB
64 MB
96 MB
128 MB
64 MB
128 MB
192 MB
256 MB
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