MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode. Kingston offers "K2" kit part numbers for Dual Channel mode. All modules must be identical for Dual Channel with Dynamic Mode.
When running at 800MHz FSB, DDR333 will clock at 320MHz only.
This system only supports 4 ranks of DDR400 memory. If more than 4 ranks of memory are installed, the memory will clock down to 333MHz.