Well I tried to look for a thread for Ivy Bridge overclocking but the last thread was closed to replies. Funny, I couldn't find another one here at TPU forums. Anyways... Got the itch to overclock again today after a long hiatus (Diablo 3...). Microcenter, Tustin, CA. Batch#: 3231B415 - they had a lot of them. Not delidded, quick 30 min air testing... Needless to say, I'm McLovin' it! http://i246.photobucket.com/albums/gg84/jhchang69/3770k48ghz3231B415_zps2a62b44b.jpg More long term testing to follow sooner or later, looks like I might be ordering some Cool Laboratory Liquid Pro! EDIT: 1 hour prime95 x64 v26.6 (no AVX, LOL I'm still on air) 4.8ghz @ 1.20-1.24v range on air: http://i246.photobucket.com/albums/gg84/jhchang69/3770k48ghz3231B415_zpsdc9d043f.jpg Looks like that's my limit for now (load 79c) unless I delid... Seems like these newer Costa Rica batches coming out are incredible from what I've seen on other forums too!