Greetings @Ionmaster987 Specifically on the H100i Platinum RGB it just connects to your board via a USB 2.0 header and you run this via the iCUE software. If you have a lot of Corsair RGB devices they do sell the Corsair Command Pro to manage everything, with the Corsair Node's as expansion options for multiple devices.
The fan speed is controllable by your motherboard/monitoring software, based on your CPU temperature. You do NOT need the Lighting Node Pro or Commander Pro to change the actual fan speeds.The difference between the two coolers is that the H100i RGB PRO XT does not have RGB fans, while the H100i platinum does. Both of them have RGB on the pump. Based on Cosair's spec sheet for your case it can only support a 120mm radiator, not a 240mm.
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