Quote Originally Posted by sredmon View Post
I use current Firefox with several security/privacy add-ons, current Thunderbird with IMAP account, and Dropbox. That probably explains high CPU usage?
Sure it may - but with enough RAM, that should work out about the same regardless of installs. That is, unless there is an aggressive cache-writing/reading policy in place that effectively circumvents the Linux kernel's RAM-caching. In that case, we might se a double effect, both direct CPU usage and indirect through inefficient reading/writing. USB handling has traditionally tended to be rather CPU-intensive in any case.