Not sure if this will help some of the clock drift issues on AMD X2 CPUs but might be worth trying. It is reported here at The Register http://www.theinquirer.net/default.aspx?article=32790 and can be downloaded from AMD http://www.amd.com/us-en/assets/content_type/utilities/TscSync.zip.
Don't have access to my dual core machines at the moment but would be interested to see if it helps anyone.
Dave