Configuring The System Memory - AOpen AP5VM User Manual

Hardware Installation
2.4

Configuring the System Memory

Pin 1 of
DIMM
Pin 1 of
Bank1
Pin 1 of
Bank0
The SIMM supported by this mainboard can be identified by 4 kinds of factors,
Intel VX chipset does not support 64M bit technology.
♦ Size: single side, 1Mx32 (4MB), 4Mx32 (16MB), and double side, 1Mx32x2
(8MB), 4Mx32x2 (32MB).
♦ Speed: 60ns or 70ns access time
♦ Type: FPM (Fast page mode) or EDO (Extended data output)
♦ Parity: without parity (32 bit wide)
The DIMM supported by this mainboard are always 64-bit wide SDRAM.
♦ Size: single side, 1Mx64 (8MB), 2Mx64 (16MB), 4Mx64 (32MB), and
double side, 1Mx64x2 (16MB), 2Mx64x2 (32MB).
♦ Speed: normally marked -67, which means synchronous to maximum
67MHz.
♦ Parity: without parity (32 bit wide)
Because Pentium processor has 64 bit bus width, the four SIMM sockets are
arranged in two banks of two sockets each, they are Bank0 and Bank1. Both
SIMMs in each bank must be in the same size and type. It is allowed to have
different speed and type in different bank, for example, 70ns FPM in one bank
and 60ns EDO in another bank, in such case, each bank is independently
optimized for maximum performance. The memory timing requires at least
70ns fast page mode DRAM chip, but for optimum performance, 60ns EDO
DRAM is recommended.
2-28
This mainboard has four 72 pin SIMM sockets
(Single-in-line Memory Module) and one 168 pin
DIMM socket (Dual-in-line Memory Module) that
allow you to install system memory from
minimum 8MB up to maximum 128MB.