Lol, I remember when DJ-CHRIS helped my with this during my noob days :classic: Aah, the good 'ol days.
Ok, back on topic. You know how memory runs at 200MHz right? Well, thats the stock speed. Any higher is considered overclocking the memory. Now some memory, like Value memory, can overclock very little. That is why memory dividers were invented. They allow you to run the CPU and System Bus at higher frequencies, while the memory only runs at a fraction of that speed. For example; A 5:6 memory divider, also known as setting the DDR speed to 166MHz on some motherboard will automatically cause the memory to be underclocked to 166MHz while the HTT is at 200MHz. Basically, for every 6 MHz of the HTT, the memory will run at 5MHz. If you want to figure out the speed of the memory from the HTT, you take the HTT speed, multiply it by 5, and divide that number by 6 and you have the memory speed. This allows you to overclock your CPU without overclocking your memory. At 250HTT, the memory will be running at 208MHz with a 5:6 divider. 208MHz is an overclock that any memory can do, even value memory.
To set a memory divider, you go into the BIOS of your motherboard and either set a ratio, such as 5:6 or 2:3, or on some motherboards (like mine), you have to choose the frequency that you have to run it at. For example; a 5:6 divider would be a 166MHZ, or DDR333 memory divider. A 2:3 divider might be seen as setting the memory speed to 133MHz, or DDR266.