Download PBO2 Tuner. It will allow you to set a negative voltage offset to your X3D’s voltage/frequency curve. It’s super easy to do, and it will lower your temps.
PBO2 Tuner is a stand alone windows utility which doesn’t need to be installed and can just run from a folder, it’s very light.
From my observations most X3D’s can handle -20 to -25 with ease, producing less heat, and achieving higher boost clocks in certain situations.
Nothing to be afraid of, super easy, and non permanent unless you make it so.
Just start off with -10 -10 -10 -10 -10 -10 -10 -10