Is there any way to overclock my PIII without changing FSB and consequently PCI and AGP clocks. I konw the multiplier is fixed but is there a way around that?

Overclocking the FSB is almost always the way to go. Overclocking by the multiplier increases the CPU speed but does very little to improve overall system performance. If you're starting at 133MHz FSB, the max safe FSB would be 150MHz. That would put your PCI speed at 37.5MHz, which is considered to be the safe max before running into problems. Chances are, your PC133 RAM won't handle 150MHz anyway. My guess is the best you'll do is between 140-145MHz. That'll put your CPU speed at about 840-870MHz. Not much of an overclock, but the higher CPU & RAM bus should give the system a slight boost...much more than overclocking via the multiplier would do. Asus A7N8X-X 1800+ @ 8 x 210MHz 768MB PC3200 Asus A9550 128MB/128-bit WinME/WinXP Pro