Mathematica 5
The following tests are scientific calculation programs, starting with Mathematica 5 of Wolfram Research. For this test, we used the test suite developed by Stefan Steinhaus.

Here, the double channel and cache seem to have a slight influence on results. Performance gaps aren’t large, however. The Athlon 64 3200+ Socket 754 is, for example, 6% faster than its Socket 939 counterpart.
WinRAR 3.4
This test is the compression of a 535 MB file to RAR format in "best rate" via WinRAR 3.3.

WinRAR benefits from the improvement in cache, and slightly uses the double channel. The performance gap between the A64 3200+ S754 and S939 due to the difference in frequency (10% higher for the first) is reduced to 3.1%. The S754 is still the fastest!