FurMark is a tool that can be used to stress test for your graphics card. You can use it to see what temperature your graphics card reaches and to see if your computer crashes. In this guide to Furmark, we’re going to discuss whether it’s worth using, how to use FurMark, and how to interpret the results when you test your graphics card using Furmark. What Is FurMark? FurMark is a free utility which undertakes a graphics card stress test to determine performance and stability.