Here’s the sequence of steps we recommend when undervolting a CPU: But even if everything seems fine, you’ll have to do a thorough job of validating your settings. It’s inevitable that you’ll get a crash or system freeze at some point, which is usually an indication that you have to back off a notch or two. With every new voltage setting you need to make sure everything is still working as intended. So if you’re using a recent AMD CPU definitely look into it. The latest version of the software offers an adaptive undervolting feature which can have a significant effect on performance, heat and battery life. The good news is that AMD have their own utility known as Precision Boost Overdrive. The main issue is that XTU doesn’t work with AMD CPUs. So, what about AMD users? We didn’t have an AMD machine to test, but the principle remains the same. We don’t recommend you do this unless you know exactly what you’re doing. The only way to get the function back would be to flash an older unpatched version of the BIOS, if available. This is thanks to a hacking exploit known as Plundervolt. In XTU these are all under the “core” section of the app. Luckily for undervolting we only have to care about a small number of settings. Sadly, the program isn’t the most user-friendly in the world and it has a heap of settings and sections that can be confusing if you aren’t familiar with all the CPU jargon. No one knows Intel’s CPUs better than Intel, after all. If you’re using an Intel CPU, then the Intel Extreme Tuning Utility (XTU) is a good choice. There are two popular utilities that avid undervolters use to wean their CPUs off the juice. Undervolting a CPU With a Software Utility This lengthy process of validation is why most people use a software utility to mess with their voltages.īe aware that if you don’t have a performance-oriented BIOS, it’s possible that there are no CPU voltage controls for you to tweak. Since after every adjustment you’ll need to boot into Windows, run a test and then adjust again. While this is a legitimate way to undervolt a CPU, using the BIOS can be incredibly tedious. So you’ll have to refer to your motherboard manual to know exactly where to go in order to change the CPU voltage in the BIOS. Each motherboard has slightly different BIOS menus, names and steps. That’s the firmware that makes your computer run before the operating system even kicks in. The purest way in which to undervolt your CPU is the BIOS. Too much voltage is a fast and effective way to permanently fry a CPU, so make 100% sure that you’re turning the voltage dial in the right direction! Undervolting Through the BIOS Apart from potential data loss, another real danger when it comes to undervolting is that you accidentally overvolt your CPU.
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