Oh yeah I remember this board. Ok JBAT1 is the clear CMOS. So to clear the CMOS you are goiing to move the jumper over to pin 2-3. When you do this make sure the PS is uplugged. Once you have cleared the CMOS, move the jumper back to the 1-2 position. Now before you reboot you need to make sure the other jumpers are set correct. It looks like there are 2 seperate jumpers for CPU frequency, JP1A1 and JP1B1. From the picture it looks like each of those is a 3 pin configuration. If that is the case, you would simply just remove the jumper to set those at 133 fsb. Next you need to set the DDR voltage, this is done by removing the jumper on JP1. By doing this you set the DDR voltage to 2.5V. The last jumper setting you need to check is J2A/B/C/D and J3A/B/C/D. If your computer has been booting I have to assume these jumpers are set correct and you shouldn't have to mess with them. Do all of the above and then boot your computer. Cross your fingers and it should boot up at 2.66. Let me know what happens.