This guy does a lengthy review and testbed bench with Ivybridge. If you skip to 21:00, he talks about how he's disappointed with it, how it heats up massively at the slightest voltage increase, and how it doesn't overclock as well as Sandybridge. These are his conclusions based not only on his own testing but 30 other Ivybridge chips. Quite interesting, see what you think.
http://www.youtube.com/watch?v=9685x0ORYjI&feature=plcp
http://www.youtube.com/watch?v=9685x0ORYjI&feature=plcp