Originally posted by: naruto1988
if i buy some more corsair valueram DDR400 and replace the geil, would all the RAM run at 200MHz?
		
		
	 
Even if all the memory is exactly the same, it won't run at DDR400. The memory controllers on A64 CPUs have trouble running 4 sticks of memory, so the memory speed defaults to DDR333 (166mhz) and the Command Rate defaults to 2T. Some have had success getting the memory back to stock speeds, but overclocking beyond that is pretty much impossible. As is a 1T Command Rate.
Since you can not set dividers on your board, you're stuck at 166mhz unless you can change FSB and multipliers.
Your PC will probably be faster with just 2 sticks of matched memory running in dual channel mode.