NEC DIRECTION L Manual page 72

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Depending on product upgrade availability, your system
memory can be upgraded to a total of 384 MB. When
upgrading your system memory, note the following
conditions:
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Be sure to use 168-pin 3.3V DIMMs with gold-plated
contacts.
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Bus speed of 66 MHz only is supported.
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Non-Error Correcting and Checking (64-bit) and ECC
(72-bit) DIMMs are both supported. When ECC
memory is installed, the BIOS automatically detects its
presence, and offers the Setup option to enable ECC
mode.
NOTE
Although memory size and type may vary, the
SDRAM DIMMs must meet the Intel 4-clock, 66-
MHz, unbuffered SDRAM DIMM specification for
either 64-bit or 72-bit SDRAM.
Use the following procedure to:
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Check the memory installed in the system
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Determine the DIMM configuration needed to increase
memory
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Identify DIMM sockets.
NOTE
If any cables block access to the DIMM
sockets, label and disconnect them. If any boards
block access to the sockets, remove them.
Installing Options 5-13