Not forgetting the main feature of the ML120 Pro RGB fans, the lighting is provided by 4 LEDs located at every quarter-turn around the centre hub of the blades. Those lighting effects are providing by the Lighting Node PRO, a small device included with the ML120 Pro RGB package that connects to the Corsair Link software via a USB header.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips