Most CPU & GPU cooling fins and heat sinks in laptops are made of Copper. Works fairly well and is cheaper than Silver or Gold! 
"Insyde" is UEFI software. I know absolutely nothing about UEFI BIOS settings. If your documentation doesn't mention setting hardware parameters then ...
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Thermal Conductivity, expressed in W/(cmK) @ 1 atm, 25 degrees Celsius:
silver = 4.29
copper = 4.01
gold = 3.17
aluminum = 2.37
nickel = 0.907
lead = 0.353
mercury = 0.0834
silver = 4.29
copper = 4.01
gold = 3.17
aluminum = 2.37
nickel = 0.907
lead = 0.353
mercury = 0.0834
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