User Guide

Hardware Installation
2-19
SIMM
Data chip
SIMM
Parity chip
Bit size
per side
Single/
Double
side
Chip
count
SIMM
size
Recommended
16M by 4 None 16Mx32 x1 8 64MB Yes, but not tested.
16M by 4 None 16Mx32 x2 16 128MB Yes, but not tested.
16M by 4 16M by 4 16Mx36 x1 9 64MB Yes, but not tested.
16M by 4 16M by 4 16Mx36 x2 18 128MB Yes, but not tested.
Warning: 64MB SIMMs using 16M by 4 bit chip (64M bit
technology) are not available in the market and are not
formally tested by AOpen quality test department yet.
However they are supported by design specification of
chipset and they will be tested as soon as they are
available. Note that 64MB SIMMs using 16M by 1 bit
chip (16M bit technology) have chip count exceed 24
and are strongly not recommended.
Tip: 8 bit = 1 byte, 32 bit = 4 byte. The SIMM size is
represented by number of data byte (whether with or
without parity), for example, the size of single side SIMM
using 1M by 4 bit chip is 1Mx32 bit, that is, 1M x 4 byte
= 4MB. For double side SIMM, simply multiply it by 2,
that is, 8MB.
Following table are possible DRAM combinations that is NOT recommended:
SIMM
Data chip
SIMM
Parity chip
Bit size
per side
Single/
Double
side
Chip
count
SIMM
size
Recommended
1M by 1 None 1Mx32 x1 32 4MB No
1M by 1 1M by 1 1Mx36 x1 36 4MB No
1M by 4 1M by 1 1Mx36 x2 24 8MB No
4M by 1 None 4Mx32 x1 32 16MB No
4M by 1 4M by 1 4Mx36 x1 36 16MB No
16M by 1 None 16Mx32 x1 32 64MB No
16M by 1 16M by 1 16Mx36 x1 36 64MB No