Even when dealing with an overclocked octa-core Ryzen 7 1700 CPU at 3.9GHz, the Corsair Hydro Series H110i could handle its task with ease, so we have got a maximum of 50 degrees Celsius while running an instance of Prime95 in the Quiet Profile. The noise levels are also very acceptable in this state, since we have measured a maximum of 39.7 dBA, 30 cm away from the test system. Link