Aluminum raw material is 25RMB/kg
Copper raw material 60RMB/kg or more.
1 Copper is more difficult to process than aluminum, processing costs are high
2 Copper is better than aluminum heat dissipation, in the same fan, the volume of copper to run the aluminum is almost the same, the same volume of copper weight is 3 times the weight of aluminum
3 No alloy copper, either copper base plate with aluminum, or add a heat pipe, heat pipe 10 bucks a not too much, I have to cut through it, the inside is empty, the thickness of 0.4mm is copper. The thickness of 0.4mm is copper. Otherwise how so light. But there are other things, the technology is more complex and expensive.