I have nforce2 baced MB with sempron at 2GHz and 2GB Ram. The problem is, when I am running some prog, e.g. winamp, and start to browse, cpu usage "flies" to 100%, and music starts to slow down, when page is loaded, everything goes back to normal. Winamp is just an example. However, in a few ocasions, the problem has resolved itself unexpectedly on its own.
Normally my dwnld speed is 1,2MB/s, but with this problem won`t breach treshold of 320KB/s.