cpu undervolt

Hello, XMP profile renders my system unstable so I want to manually adjust voltage, frequency and timings. But I heard that if I am planning overclocking both RAM and CPU, I must first overclock CPU (making sure first to set my RAM to its default, non-overclocked speed) and after CPU is stable...

Specs: I7-9750H RTX 2060 16GB RAM So I have a Lenovo Y540 that I've owned for about 6-7months. It's been working pretty well, and recently, I decided to do some undervolting to help with the high CPU temps. I followed a guide on reddit for Lenovo Y540/Y740, and undervolted my CPU to -145mV. It...