Is it worth using faster memory, such as DDR2-800MHz modules?
The FSB for the Intel 910GML chipset is rated for 400 MHz, quad-pumping (4x) the bus speed of 100 MHz. When running the stock 630 MHz CPU speed, the bus is clocked at 70 MHz and is resulting in a FSB of 280 MHz (4x 70 MHz). Datasheet for Intel 910GML There is no need to choose memory modules faster than 400 MHz. Asus probably chose to go for a stock DDR2 667 MHz module for reasons of availability and cost.
