The X3 720 looks to be a decent overclocker!!
Here are some reviews for both processors:
http://www.hexus.net/content/item.ph...=17113&page=12
http://benchmarkreviews.com/index.ph...&limitstart=10
http://benchmarkreviews.com/index.ph...&limitstart=10
http://www.xbitlabs.com/articles/cpu..._17.html#sect0
http://www.legitreviews.com/article/898/15/
http://enthusiast.hardocp.com/articl...50aHVzaWFzdA==
http://www.neoseeker.com/Articles/Ha..._720be/15.html
http://www.bjorn3d.com/read.php?cID=1489&pageID=6339
http://icrontic.com/articles/amd%E2%...0-processors/9
http://www.guru3d.com/article/amd-ph...-review-am3/26