The actual link to get the .tar.gz archive is http://cpudb.stanford.edu/cpudb.1416196069.tar.gz (on the download page, both links points to the .zip file). They are basically the same size anyway (~728kiB).

A few interesting charts showing the evolution of CPUs:

* Transistor size (http://cpudb.stanford.edu/visualize/technology_scaling): the process is still regularly scaling down

* Clock frequency (http://cpudb.stanford.edu/visualize/clock_frequency): processors do not tick significantly faster than 4GHz, a speed they reached in 2004/2005

* Performance (http://cpudb.stanford.edu/visualize/performance_by_freq_and_...): I am still unable to display this graph

The clock frequency graph shows a processor at 21.3GHz. It's the Z3480, whose clock actually ticks at 2.13GHz (http://ark.intel.com/products/70102/Intel-Atom-Processor-Z34...).