TYAN S2723 User Manual page 18

Memory Pair Installation
When installing DIMM modules, you should install pairs in this order: B1 + B2 or A1 + A2.
Modules must be the same in both size and density. Modules mu st also use the same chip
configuration, as in each module that is installed must physically have the same number of
memory chips on them.
Points to remember:
At least two Registered ECC DDR SDRAM modules must be
installed for the system to turn on and POST (Power On Self
Test). Single Channel memory support is not currently available.
Please check Tyan's website for updates on this topic.
Use ONLY x8 or x4 type memory modules. Mixing memory types
may affect stability.
128MB, 256MB, 512MB, 1GB, and 2GB Registered ECC
PC2100/PC1600 DDR SDRAM memory modules are supported
in x4 or x8 configuration.
The Tiger i7501 S2723 supports up to 8GB of memory with 2GB
registered DDR modules.
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