You need a board with 100 fsb support. If you have the old 440 LX chipset, this is not possible. You need the 440 BX chipset. If you don't know your motherboard model, write down the id number at the bottom of the page when you see the first screen at boot up, and go to motherboard homeworld to identify the board. If your motherboard has a fsb jumper, you can simply change it from 66 to 100. If it auto selects your fsb, you may have to tape off a small section of the cpu to manually set the fsb.