Memory Installation - Kontron PCI-759 User Manual

8. Memory Installation

8. Memory Installation
The PCI-759 board supports two 240 pin DDR2 DIMM sockets for up to a total memory of up to 4GB DDR2 SDRAM. The
single/double sided memory modules can be user-defined combined in sizes of 256MB, 512MB up to maximum 2GB pro
DDR2 DIMM socket.
The majority of systems supporting dual-channel memory can be configured in either single-channel or
dual-channel memory mode.
The speed used in all channels is the speed of the slowest DIMM in the system.
Only around a memory of 3.5 GB is usable for most of 32 bit operating systems.
The DIMM0 (nearest positioned to the CPU) must be fitted first for AMT and QST feature.
For the best dual-channel memory performance on boards with the Intel dual-channel DDR2 chipsets must be used
identically paired memory modules in channel A and B.
We recommend installing into the board DDR2 DIMM sockets a dual channel kit (identically manufacturer, capacity,
speed, number of chips and modules).
Prerequisites for dual-channel memory configuration:
1. Both modules are the same capacity (e.g. both are 256MB or 512MB)
2. Both modules are the same speed (e.g. both are PC2700 or PC3200)
3. Both have the same number of chips and module sides (e.g. both have the same number of chips on the module, and
both are either single-sided or double-sided).
If other memory configuration is used, the system will revert to the single-channel memory mode
(lower-performing mode).
The speed of the bus clock and the timing of the memory access for the main memory (RAM) are given by
the slowest DDR2 DIMM Module built-in the system.
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PCI-759 – User's Guide (V1.02)
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