Should the water-cooling radiator be placed in the front or on the top of the case?

Depending on the length of the water-cooling pipe, install it first on the top of the chassis, followed by the tail. If it is not possible, you need to install it on the front, because there are air inlets under the front panel or on the side of the computer, and the radiator is required. If it blows outward, if it is installed on the front, it can only blow inward. The hot air will blow into the chassis and affect certain heat dissipation. Alternatively, you can modify the chassis air duct and add an inlet fan from the rear to allow the computer to exhaust air from the front.