System Monitoring: Corsair Link 4 can provide real-time information about your system’s temperature, voltage, and fan speeds.Here are some of the most notable features: Some of the features of Corsair Link 4 include:Ĭorsair Link 4 has many features that can be very useful for monitoring your system’s performance and customizing your RGB lighting. You can also use it to control your fan speeds and pump speed. Corsair Link 4 is a free PC monitoring software that allows you to monitor your system’s performance and customize your RGB lighting.