somewhat agree with deadlock. Due to turbo mode, overclocking the sandybridge cpus are somewhat more complex. Nonetheless 33x multiplier is plenty, just start raising your FSB and youll get higher clock. strongly recommend a guide before you do this yourself.
again turbo mode automatically increases your multiplier by 5x (i think) during computing intensive tasks. You can disable or override this but I am not entirely certain how. I have seen it before using intel extreme overclocking package.