Viperlair posted a review on the OCZ DDR PC-3500 Gold Gamer eXtreme memory

One of the features I really like is the EVP, that's basically OCZ saying "We know you are going to tweak this RAM to get the best performance possible, and that's OK with us." Features like this show how enthusiasts, gamers etc. have shaped the industry. It wasn't to long ago that doing things like modifying voltage etc would void your warranty. These days manufacturers are providing end users with the tools needed to overclock and tweak their hardware without having to worry about voiding the warranty.

OCZ DDR PC-3500 Gold Gamer eXtreme Review