To check if your GPU has its own fan, you can look at the packaging or box it came in, or you can Google its model number. You can bring up the fan speed control by tapping the Ctrl+F keyboard shortcut however, your GPU must have its own fan in order to be able to use this feature. There are two common problems that users experience in MSI Afterburner they’re unable to access the graph for customizing the fan speed, or the sliders that control the clock speeds do not work. If you’re trying to use MSI Afterburner to change how the hardware on your system works, and you’re unable to change anything or the various controls aren’t working, here’s what you can do. It supports both Nvidia and AMD GPUs, and can also be used to control the fan speed of a GPU as well as monitor its temperature. Most guides mention this app as an easy and reliable way to overclock a GPU or undervolt it. If you’re looking to overclock a GPU or undervolt it, you will have heard of an app called MSI Afterburner.