Overclocking is just as much a science as it is an art form. I've avoided liquid cooling systems and certainly have not attempted liquid nitrogen, but I have used big fans and big heat sinks to keep my overclocked computers reasonably cool. 7.93 GHz CPU and FSX with sliders all the way to the right? Yep, that CPU has the power, but can the rest of the system keep up the pace? It's all about balance. Kind of like high performance engines. A massive twin four-barrel carburetor/intake manifold sitting on a factory stock engine isn't going to do any good, you have to build the whole engine to match and balance the abilities of each component.