I was able to do some research and yes, this cooler is sufficient and even matches the performance of the Ryzen 7 9800X3D processor very well.

Yes, this kit is sufficient for a Ryzen 9 9950X3D. It is compatible with socket AM5 and designed for high-end processors up to around 250W load, as shown by tests on very greedy CPUs such as the Core i9 with a similar TDP and power consumption.

Hello, here are the RX 120mm fans from Corsair pre-assembled. Greetings

Yes, already applied to the heat sink. No other paste is included.

Yes, this is the model with the lcd

The iCUE LINK TITAN 360 RX RGB CPU water cooler from Corsair comes with an integrated iCUE LINK module that allows you to control and customise the RGB lighting and fan speed. In terms of the number of fans that can be connected, three 120 mm RX120 RGB fans are already pre-installed on the radiator. However, the iCUE LINK system makes it possible to control and integrate additional fans and devices via the iCUE software. There is no specific upper limit to the number of fans that can be connected, as long as they are compatible with the iCUE LINK technology and can be connected via the available connections.