I never understood the 'need' to undervolt a laptop's CPU. When they say 'not supported' it doesn't mean that 'it is 100% impossible' to do something (like installing an unsupported app on 'not valid hardware'.), but what it does mean is that there is no guarantee at all from the vendor/manufacturer, developer' and there should be no expectation from the user of having the developer looking into 'bugs' on 'unsupported scenarios'. Notebookcheck assumes no liability for possible damage caused by modifications.The fact that you 'were able to use xtu somehow with some functionalities' doesn't mean, and never meant that your 'H' mobile CPU was supported. We recommend reducing the voltage in small steps and testing every level with the integrated Intel XTU stress test (see following picture), for example. Even identical configurations can behave differently and you should be conservative when you try to find the limit. Note: The shown values only apply for our specific test models. We used the free tool Intel Extreme Tuning Utility (XTU) for the following examples. We already explained how this undervolting process works in this dedicated article. This leaves unused potential for optimizations, so you can improve your laptop with some time and testing. Not every processor is identical, so Intel sets a default voltage to make sure the processor works without problems at the designed specs. Today, we are going to have a closer look at the processor core voltage with two examples, the Lenovo ThinkPad X1 Carbon ( Core i7-8550U) and the ThinkPad T480s ( Core i5-8250U). The current ThinkPad lineup alone shows massive differences, as we have seen in this article. We have already tested numerous devices and there can be big differences when it comes to the performance utilization. However, this also results in higher power consumption and higher temperatures. They offer four native CPU cores and are much faster compared to the old dual-cores. Basically, every new ultrabook or laptop released since last autumn is equipped with Intel's new 8th Gen ULV-processors.

Intel extreme tuning utility i7 8750h