Air or liquid? That’s the decision you face after choosing a CPU—especially those one that doesn’t come with a stock cooler. Both mediums have their strengths and weaknesses, so the best choice will depend on many factors, including the motherboard, case, memory, and processor.
Liquid cooling uses a pump with circulating fluid to quickly draw heat away from your CPU, dissipating it in a radiator typically mounted on the back or top of your case. The radiators tend to be larger and spin slower, generating less noise. Air cooling heat sinks, on the other hand, don’t leak, and the fans can help cool other motherboard components like power circuitry.
Both technologies are subject to compatibility issues, so take measurements and don't be afraid to ask us for advice!