P5SD-B
User’s Manual
4:
Reference Information – 4.13
System Memory Specifications
The memory subsystem has four 72-pin SIMM sockets di-
vided into two banks, SIMM1 & SIMM2 and SIMM3 & SIMM4.
It also has two DIMM sockets. You cannot use SIMMs and
DIMMs at the same time on this mainboard.
SIMM modules should use either Fast Page Mode (FPM) or
EDO 5-Volt DRAM. You can use modules from 4MB to 128MB,
either single or double-sided. DIMM modules must use 3.3-Volt
unbuffered EDO or SDRAM. Total supported memory capacity
is 256MB.
Memory Configurations
SIMMs install in pairs. You can install any SIMM memory
combination as long as you follow the basic requirement of in-
stalling identical modules in both sockets of a bank, i.e.:
• 5-Volt modules
• Both modules are the same size, e.g. 16MB (MegaBytes)
• Both are the same DRAM memory type, e.g. EDO
• Both use the same operating speed, e.g. 60ns (nanoseconds)
Each DIMM is a memory Bank. You can install DIMMs with
these specifications:
• 8MB to 128 MB single or double-sided modules
• 3.3-Volt unbuffered EDO or SDRAM DRAM modules only
Other than these requirements, there is no limitation on the
variety of possible combinations, so they are not listed here.
Note: It is possible to install more memory than the board
supports. Do not install more than 256MB on this mainboard,
the system will ignore additional memory.
You can not use SIMM and
DIMM modules at the same
time on this mainboard.
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