gpu backplate
18 minutes ago, aarie said:thank you so much for responding.
but i have no backplate at all so do you maybe know how i can make one from scratch? or can i just paint the top of my gpu with spraypaint
From the way you explained it in your original post I was left with the impression that you already have a backplate. Anyway, the easiest thing to do is just buying a backplate that is for your specific graphics card. A quick google search suggests that these guys make one that should fit your card - https://www.coldzero.eu/asus-rx-580-dual-gpu-backplates/ . Making a backplate yourself out of aluminum or stainless steel from scratch is also an option, but considering that you were thinking of making one out of paper, I doubt that you will have the necessary tools and expertise to make one yourself.
PCBs are quite good at dissipating heat. Not as good as an actual heatsink, but they tend to a decent job. Spraying or plastidipping the PCB directly is not a great option, as once again it will act as an insulator. So I can't really recommend doing this.

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