The clock generator depends on the motherboard. You could try using ClockGen to change it from Windows. Most popular motherboards are supported. If you go too far, your computer will freeze. When you reset the computer, your FSB will be back to normal. But whatever you do, don't unplug the computer and take out the battery for 10 seconds (and put it back in) because that won't reset the BIOS and it won't clear the password and it won't let you change the FSB. (If you're going to play around in the BIOS, make sure that you're really careful with what you change. These values won't reset when the computer restarts. If you change something and the computer won't turn on (and it might beep a lot too), unplug all the cables and pull the battery out again. The biggest thing you should absolutely not change is any voltages. Everything else shouldn't damage the computer. Also, your parents will know you've reset the BIOS if they try to go in it and find that there isn't a password.) Although you haven't told me much, it's probably your memory. Keep in mind that it could also be your processor. My Corsair XMS memory won't do over 207 at their rated 2-3-2-8 no matter how many volts I throw at it. I have to run them at 3-3-3-8 which lets me bring my FSB up around 240. I haven't tried 2.5-3-3-8 yet. If your motherboard will let you set a memory divider, set the divider to 5/6 (or 166MHz) and try overclocking again. If you can't get a higher overclock, then your memory is probably not to blame. If you can get a higher overclock, you could try raising your latencies or keep the divider.