I just raise the cpu fsb by 20% to start, and see if the ram follows. Many boards still set the ram default setting to 1066 for ddr3. I normally set my ram a notch lower and the cpu fsb up by the same percentage. For example, if the cpu fsb is normally 200, I set it at 240 fsb. If the ram is 1600, I manually set it to 1333 (or 667, if the listing is half the actual speed). Ram willl normally overclock by the same percentage as the cpu, or the board may clock it down if it's set to auto to prevent a system crash.