Installing and Configuring Motherboard Options
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Installing SIMMs
The system board contains four 72-pin, tin lead SIMM sockets. You can configure the
system memory from 8 MB to 128 MB. The sockets are arranged as banks 0 and 1.
Two sockets make up one bank.
When adding memory, follow these guidelines:
•
When you install SIMMs, you must completely fill at least one bank; that is, two
sockets make up one bank.
•
The computer automatically detects the installed memory, so it doesn’t matter which
bank is used, as long as both sockets in the bank are filled.
•
All SIMMs in one bank must be the same size. For example, don’t install a 4 MB
SIMM in one socket of bank 0 and an 8 MB SIMM in the second socket of bank 0.
You may, however, use different size SIMMs between banks.
•
When adding SIMMs, use only tin lead, 72-pin, 70 ns fast page SIMMs or, for
optimum performance, 60 ns EDO DRAM. Either ECC parity or non-parity SIMMs
are supported.
The types of SIMMs that can be installed are listed in Table 1. Table 2 lists the possible
combinations of SIMM types and the resulting amount of system memory.
Table 1. Supported SIMM Sizes
Total Memory Size
of SIMM
SIMM configuration
(without parity)
SIMM configuration
(with parity)
4 Mbytes
1M x 32
1M x 36
8 Mbytes
2M x 32
2M x 36
16 Mbytes
4M x 32
4M x 36
32 Mbytes
8M x 32
8M x 36
/
NOTES
The board supports parity (x 36) or non-parity (x32) SIMMs. Error checking and
correction (ECC) is supported with parity SIMMs. There is no ECC with non-parity
SIMMs.
All SIMM socket sites must contain the same size SIMMs.
