I always get less overclock that the magazines. The last machine I had, an Athlon 64 2800+, I got from 1.8GHz to 2.25GHz, but most of the reviews were reporting 2.4-2.6GHz. I think this is because I really want these to be stable.
“AMDZone”:http://www.amdzone.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=164&page=1 got theirs to 2.7GHz but don’t have any details about how they did it and what they overvolted. “Xbitlabs”:http://www.xbitlabs.com/articles/cpu/display/athlon64-x2-3800_12.html got theirs to 2.4GHz without changing the stock voltage (wow!), but no word on stability. Finally “Legitreviews”:http://www.legitreviews.com/article.php?aid=229 they got to 2.7GHz with 1.6V on the CPU