iCUE is Corsair central hub software, designed to connect and control everything Corsair branded in one place. While the RGB DRAM lighting control is only one part, any Corsair peripherals, such as headsets, keyboards, mice can be managed by iCUE as well. This integration of Corsair products makes it a must for installation due to the convenience of having a single program for everything Corsair related. Additionally, with the Corsair Commander hub, case fans can be synced and controlled by iCUE.
With the newest release, the iCUE software has received some new features and improved on older ones. For these Corsair Dominator Titanium memory kits, the ability to create user profiles is a new feature. Type in the values you want, and when in the motherboard BIOS, you can choose that memory profile just like you would for XMP. The only catch here is that the motherboard has to support it, and the test profile created does show up in the SPD flashing program but not in the ASUS Z790 Apex motherboard BIOS. This is because ASUS lacks support for user created profiles, as observed with other memory kits as well.