7-zip has been added to our test protocol. In contrast to WinRAR, this application is highly multithreaded if its highest performance algorithm, LZMA2, is used. We measured the time required to compress a large volume of files.
This time there was a substantial gain in performance with the FX-6100 managing to position itself at the same level as the 1100T and the FX-8150 closer still to the i7-2600K, though still with a deficit of 7%. With compression software generally putting higher demands on the memory subsystem, these gains can be linked to the increase in cache size and improvements to the memory controller.
The same files were compressed in WinRAR using the most demanding RAR algorithm ("Best").
WinRAR doesn’t unfortunately really exploit more than two cores, but again it does seem to benefit from the AMD FX caches and memory controller. There’s a significant gain on the previous generation but unfortunately for AMD, WinRAR is even more comfortable on the Intel processors, the low multithreading optimisation not making it conducive to the AMD FXs.