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2. System Memory (SIMM & DIMM)
This motherboard supports four 72-pin, 32-bit SIMMs (Single Inline Memory Mod-
ules) of 4, 8, 16, 32, or 64MB to form a memory size between 8MB to 256MB. The
SIMMs can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or Sym-
metric), or Enhanced Data Out (EDO) (BEDO & Parity are not supported). SIMMs
must be installed in pairs so that each Row (see Map of Motherboard for Row loca-
tions) contains 64-bits of the same size and type of memory chips. One side (with
memory chips) of the SIMM module takes up half a Row on the motherboard.
Dual Inline Memory Modules (DIMM's) can be used when the SIMM sockets are
not used. Two sockets are available for 3.3Volt (power level) Unbuffered Synchro-
nous DRAMs (SDRAM) or EDO DRAM of either 8, 16, 32, 64, or 128MB to form
a memory size between 8MB to 256MB. One side (with memory chips) of the
DIMM module takes up one Row on the motherboard.
IMPORTANT: Memory speed setup is required through "Auto Configuration"
in BIOS Chipset Setup of the BIOS SOFTWARE. If both 60ns and 70ns memory
are used, set "Auto Configuration" to 70ns. Do not use memory modules with
more than 24 chips per module. Modules with more than 24 chips exceed the
design specifications of the memory subsystem and will be unstable.
Memory Socket
SIMM Sockets 1&2
(Rows 0 & 1)
SIMM Sockets 3&4
(Rows 2 & 3)
WARNING: Do not install both SIMMs and DIMMs at the same time or
else you will burn your memory. Mixing SIMMs and DIMMs require 5.0Volt
(signal level) tolerant memory chips which are currently unavailable.
Memory Socket
DIMM Socket 1
(Rows 0 & 1)
DIMM Socket 2
(Rows 2 & 3)
20
III. INSTALLATION
SIMM Memory Module
4MB, 8MB, 16MB, 32MB, 64MB
72-pin FPM or EDO SIMM
(DIMM Sockets must be empty)
4MB, 8MB, 16MB, 32MB, 64MB
72-pin FPM or EDO SIMM
(DIMM Sockets must be empty)
Total System Memory (Max 256MB)
DIMM Memory Module
8MB, 16MB, 32MB, 64MB, 128MB
168-pin SDRAM or EDO DIMM
(SIMM Sockets must be empty)
8MB, 16MB, 32MB, 64MB, 128MB
168-pin SDRAM or EDO DIMM
(SIMM Sockets must be empty)
Total System Memory (Max 256MB)
ASUS TX97-X User's Manual
Total Memory
x2
x2
=
Total Memory
x1
x1
=
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