Apple allows you to install Windows 10 on your Apple Mac with the help of Boot Camp. Once you have installed Windows 10 through Boot Camp, you will be able to choose between Windows 10 and Mac OS as you please. But it is not same as installing Windows directly on your hard drive as it is accessed through special drivers installed by Boot Camp. This is supported on many Mac models like MacBook, MacBook Air, MacBook Pro, Mac Mini, iMac, iMac Pro and Mac.
If you also have installed Windows 10 on your iMac then you may want to use DrFan software that can control and show the fan speed of your iMac. This software is specially designed to run on Windows 10 running through Boot Camp on an iMac. Through this software you will be able to have much better control over the system fan speeds of your computer.
When iMac gets a little bit hot, the system is designed to lower the temperature by bringing down the clock frequency of the CPU or GPU but this slows down the system performance itself. Using the DrFan software, you can ramp up the fan speeds of your Mac and thus cool the system in that manner. This is a different approach to cooling your system compared to slowing down your CPU or GPU clock frequencies.
DrFan sits in the Windows system tray and from there you can control various limits. For example, you can set the CPU temperature limit and the GPU temperature limit. As soon as the system temperature crosses these limits, DrFan jumps into action and controls the fan speeds. How it controls the fan speeds can also be configured. There are three settings – automatic control of fan speeds by DrFan, manual control through DrFan or let Apple handle the fan speeds which is also the default setting.
DrFan cools your system without compromising the system performance and prevents Apple from throttling your CPU or GPU speeds. It works only on Windows 10 running on Apple iMac through Boot Camp.
You can download DrFan software from http://drfan.forbootcamp.org/.