Purpose. Intel Extreme Tuning Utility (XTU) is a Windows-based program that Intel promotes as a way to overclock and performance-tune your system. If you don’t, we recommend that you check out our guide to overclocking before proceeding.. For this guide, we will be using an Intel® Core™ i9-9900K desktop processor, and our recommendations and results will reflect that. Support product highlights, featured content, downloads and more for Intel® Extreme Tuning Utility (Intel® XTU) This download installs the Intel® Extreme Tuning Utility (Intel® XTU) version 6.5.2.40, including platform support for the next-generation Intel® Core™ Processor Family and the Intel® Xeon® W … Intel® Extreme Tuning Utility (Intel® XTU) is aimed at intermediate-level users that have some basic knowledge about overclocking and how it works.