R:According to the specification of VIA KT600, only DDR 266 SDRAM is supported if FSB 200 MHz CPU is installed. DDR 400 SDRAM is supported with FSB 266, 333, or 400 MHz CPU. Please refer to the following supporting table.

FSB \ Memory	DDR 266	DDR 333	DDR 400
200 MHz	Yes	No	No
266 MHz	Yes	Yes	Yes
333 MHz	Yes	Yes	Yes
400 MHz	Yes	Yes	Yes