Sorry, your wrong on this one Vejita........the ratio works like this: Whatever you set your FSB to is what it is, the ratio is what sets your memory speed. The first number is divided into your FSB and the second you multiply that number by to get your memory speed. So say you had 200fsb and use 6/6, 3/3, 4/4, they all equal 1 so 200mhz is your memory speed. If you were to use 5/6 you take 200/5=40*6=240mhz, so your memory would be running at 240mhz and fsb at 200. A little confusing at first....