The Guru of 3D published a review on the Nvidia Titan X (Pascal) Extended Overclock Guide
A quote from the article:
Today an article slash guide dedicated on overclocking the Nvidia Titan X (Pascal). Are we able to pass 2000 MHz with the 12 Billion transistors based GPU ? Yes we can, relatively easily even. Armed with a new trick or two overclocking will never be the same though. But if you want another 10% extra performance out of an already seriously fast Nvidia GTX Titan, we'll gladly show you how to do it. So you just read up on all the glory there is to be found regarding the Titan X in all its glory. And though we briefly touched on the topic of overclocking in our reference article, there's still one bit missing; extended tweaking performance. We really wanted to publish a separate article on it as a thing or two have changed with this new product that deserve some explaining.Nvidia Titan X (Pascal) Extended Overclock Guide @ Guru3D