The Lenovo ThinkPad X1 Yoga was a little warmer than we'd like, but I (mostly) fixed that. After streaming 15 minutes of HD video on the notebook, our heat gun registered temperatures on its underside (102 degrees) and keyboard (98 degrees) that exceeded our 95-degree comfort threshold. After I installed the Lenovo Intelligent Thermal Solution Driver, found in the Lenovo Vantage App, we got lower ratings from the center of its underside (96 to 100 degrees), its keyboard (94 degrees) and touchpad (81 degrees).