User`s manual

System Installation

RUBY-9719VG2AR User’s Manual 3-4

3.2 Main Memory

The board also features four DIMM up to 16 GB SDRAM with dual channel DDR2

1066/800.

RUBY-9719VG2AR provide 4 x 240-pin DIMM sockets which supports DDR2

800/1066 MHz as main memory, Non-ECC (Error Checking and Correcting), non-

For system compatibility and stability, do not use memory module without brand.

Memory configuration can be either one double-sided DIMM in either one DIMM

socket or two single-sides DIMM in both sockets.

Watch out the contact and lock integrity of memory module with socket, it will

impact on the system reliability. Follow normal procedures to install memory

module into memory socket. Before locking, make sure that all modules have been

fully inserted into the card slots.

Dual Channel DDR2 DIMM

Dual Channel DDR2 memory technology doubles the bandwidth of memory bus.

Adequate or higher bandwidth of memory than processor would increase system

performance. To enable Dual Channel DDR2 memory technology, you have to

install dual identical memory modules in both memory sockets. Following tables

show bandwidth information of different processor and memory configurations.

CPU FSB Bandwidth

1066MHz 8.5GB/s

800MHz 6.4GB/s

Memory Frequency

Dual Channel DDR2

Bandwidth

Single Channel DDR2

Bandwidth

1066MHz 17GB/s 8.5GB/s

800MHz 12.8GB/s 6.4GB/s

Note:

To maintain system stability, don’t change any of DRAM parameters in BIOS setup

to upgrade system performance without acquiring technical information.