This benchmark was for Lame and the results indicate that the i5 660, i5 661, and the i7 870 all tied for first when encoding audio from wav format to mp3 format. They all outperformed the i7 980x. Lame is obviously not SMP for more than 2 cores.
I said something to this effect back in September of 2009.
Long before Tom’s Hardware and/or Nvidia mysteriously came to the same independent conclusion on their own. Sometimes emulation is indeed the best form of flattery.