Hello, I have a desktop that has a i5-9400 not the f version. I also have a laptop with a i7-8665u, which i recently undervolted using xtu software. It really helped the temps and wanted to do the same for my desktop as I wanted to bring down the temperature. However, when I went into xtu on my desktop, I could not change the voltage on the cpu. Is this because this is a desktop cpu, as the laptop cpu is also locked but it lets me undervolt. if anyone has any solutions to this that allows me to undervolted my cpu that would be great.