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If you don't understand it, then make the effort to study it before you try to build a supercomputer. After all, building the supercomputer is only one-third of the job. First, you have to design the supercomputer, and last, you have to test it - if you don't understand, how will do you do either of those things? And if if you don't understand, you willl spend a lot of money to build something that does not work.

Start your reading here, at Princeton University http://www.princeton.edu/~mrm/tutorial/Sigmetrics2...

There are a few important factors.

The most important is number of cores (Typically)

4-6 cores is plenty

Clock speed is also very important (3.4+ ghz is plenty)

the cache is semi important (just shoot for a bigger one if possible)

If the CPU is hyper-threaded, thats awesome.

Also be sure to get a socket that matches the motherboard socket!

well you got the I7's which are the CPU's to have ut if your on a budget the AMD Bulldozer

you do have other Intel CPU's that are good for PC gaming I5 and I3

Architecture,lithography,clock speed,core count,cache size.