Hey gnbxrf, I feel your pain! Since you've already tried undervolting, my next suggestion would be to repaste your CPU and GPU. I used thermal grizzly kryonaut on mine, and it made a huge difference. There are some great tutorials on YouTube that walk you through the process step-by-step for the GS75 Stealth. Just make sure you have the right tools and be careful not to damage any components. gl