Play water-cooled friends all know, whether it is CPU cold head or graphics card cold head, are using copper material. The thermal conductivity of aluminum used for heat dissipation is also good, so why not use aluminum as a cold head?
The cold head is attached to the chip to absorb heat and transfer heat. The material used should have high thermal conductivity. Now, let's talk about the thermal conductivity
The thermal conductivity refers to the heat transferred through 1 square meter area within 1 second (1s) with a temperature difference of 1 degree (k, ℃) on both sides of a 1m thick material under stable heat transfer conditions. The unit is w / m · D.
Popular understanding is the speed at which an object transfers heat. For example, holding a stone in hot water makes the temperature almost invisible to your fingers. When Kwai is exposed to hot water with a rod, it will soon feel the temperature changes. This is actually due to the different thermal conductivity.
The original copper cold drainage channel welding needs to use tin, and the specific heat capacity of tin is very large, which restricts the cooling speed of copper, and the density of aluminum is obviously less than that of copper. For the same type of cold drain, aluminum row is lighter and more convenient to use. So strictly speaking, the difference between copper and aluminum bars is not big.