7700S 2nd gen difference?

Thanks for the detailed instructions with photos. Especially useful for me since I am about to do the same.

Me too, but I found this unofficial guide on iFixit for changing the thermal pad on the GPU. I was going to follow that one

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Why? Do they deform/break at very high or very low temperatures or something?

Nah. I used one to do the liquid metal → PTM swap, then later I did the copper shim mod and accidentally destroyed one of them in the process, and I like having an extra around incase I want to mess with it more.

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