Another question. Is the water cooling compatible with the Corsair Spec-Delta case? I don't know exactly what to look out for.

The water cooling system itself is not audible and the MasterLiquid ML240L V2 RGB from Cooler Master has very quiet liquid-bearing fans that are only audible when they run beyond 2000 rpm (but are also not annoyingly loud), which should never be the case in normal use. My fans usually run at around 900 to 1200 rpm, where they are virtually inaudible. There are also various other fans in the case that produce a very quiet running noise. In conclusion, the MasterLiquid ML240L V2 RGB is a really easy to assemble, good and powerful water cooling compact system for CPUs at a very fair price.