it's been a long time HT is out, so about every major softwares is optimized for Hyperthreading
PhotoShop CS, Illustrator CS, NAV 2005, WMP10, Nero 6+, there are many optimised for HT, even there are optimised builds for Firefox optimised for Hyper threading, U will notice benifit clearly, especially when encoding or playing games, although the Athlon64 beats Intel due to good architecture, this doesn't mean that HT is dead, it's really a cheap alternative to Dual CPU, but not perfectly, in most cases it will give u a max of 10% more performance, & with a similerly placed Athlon64 U can get about 20% more performacen compratively
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