Let's start with the radiator. Generally if the liquid circulation to heat transfer, called radiator, many also called heat exchanger, that is, heat exchanger means, such as the car side of the finned radiator; if it is directly in contact with the electronic components and devices for heat dissipation device, such radiator, generally translated as cooler, such as CPU cooler , computer cooler. At the same time, some people also put the heat sink, heatsink, also called heat sink. Strictly speaking, heatsinks do not have a fan, but are just hardware products, and a radiator is a combination of a heatsink and a fan.
The water-cooled plate, foreign called cold plate, directly translated into cold plate, many domestic translated into water cooling plate, or liquid cooling plate. This is a liquid-cooled heat transfer components, the principle is processed in the metal plate to form a flow channel, electronic components installed on the surface of the plate (the middle of the coated with heat-conducting medium), the coolant enters from the inlet of the plate, and the coolant enters from the inlet of the plate. Coolant enters through the inlet of the plate and exits through the outlet, taking away the heat emitted by the components. Water-cooled plate runner formation process is common: friction welding, vacuum brazing, buried copper tubes, deep hole drilling and so on.
If the radiator is understood as a heat exchanger, then the radiator + water-cooled plate + water pump + piping, forming a complete liquid cooling system. The water-cooled plate is responsible for absorbing the heat from the heating element and transferring it to the liquid flowing through it, while the radiator is responsible for absorbing the heat from the liquid being added with fins, and then exchanging heat between the outside air and the surface of the fins to achieve the purpose of cooling and refrigeration for the components.
I hope the above answer is helpful to you, thank you!