Asus TXP4-X 2.System Memory (SIMM & DIMM)

III.INSTALLATION

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 motherboard layout 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 Synchronous 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 Memory Module		Total Memory
SIMM Sockets 1&2	4MB, 8MB, 16MB, 32MB, 64MB	x2
(Rows 0 & 1)	72-pin FPM or EDO SIMM
	(DIMM Sockets must be empty)
SIMM Sockets 3&4	4MB, 8MB, 16MB, 32MB, 64MB	x2
(Rows 2 & 3)	72-pin FPM or EDO SIMM
	(DIMM Sockets must be empty)
	Total System Memory (Max 256MB)	=

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 Memory Module		Total Memory
DIMM Socket 1	8MB, 16MB, 32MB, 64MB, 128MB	x1
(Rows 0 & 1)	168-pin SDRAM or EDO DIMM
	(SIMM Sockets must be empty)
DIMM Socket 2	8MB, 16MB, 32MB, 64MB, 128MB	x1
(Rows 2 & 3)	168-pin SDRAM or EDO DIMM
	(SIMM Sockets must be empty)
	Total System Memory (Max 256MB)	=

III. INSTALLATION (System Memory)

ASUS TXP4-X User’s Manual 19