TechyJono, running a athlon/duron/t-bird at 133 FSB is impossible. You have to remember that these chips are on an EV6 bus, 100mhz fsb DDR (Effectively 200mhz). That means for every mhz you up your fsb, you cpu is clocked twice that amount. Running at 133 would put your cpu at 266!! that'd be insnane. Also, you have to remember that o/c'n via multiplier is a MUCH better solution than using FSB. When you up the multiplier, you are only increasing cpu speed, thus temp and voltage. When you up the FSB, everything gets increased, RAM, PCI/ISA/AGP cards as well as the cpu. Too many things can limit FSB overclocking. Stick to the multiplier for serious gains and the FSB for that little bit extra. Highest i've seen on amd chips is 110