RARLAB – WinRar v3.70 has a multithreaded version of the RAR compression algorithm, which improves the compression speed on computers with several CPU, dual core CPU and processors with hyperthreading technology. Multithreading is enabled by default, but you can disable it in “General” part of “Settings” dialog.
Results: WinRAR 3.70 showed dual-core love and the 2.2GHZ AMD Athlon 64 X2 4200+ was 335KB/Sec quicker than the 2.2GHz AMD Athlon 63 3200+. The Athlon 64 X2 6400+ showed off with it’s 3.2GHz clock frequency though and showed how the benchmark is to be done! At nearly 1MB/Sec FASTER than the Athlon XP 1800+ it just shows how far we have come over the past five years.