Quote Originally Posted by celemine1Gig View Post
Nickel, not tin. Just have a look at one of the cpu datasheets. It explicitly states the materials used.

And BTW, I don't really understand the whole "this is so shocking" part here. All this because of a little copper discoloration due to the TIM getting hotter than usual. Just a small chemical reaction between the TIM and the pure copper. Nothing more, nothing less. So, no need to worry. As already said, now you now that the shutdown temp is there for a reason.
my bad, I knew it was nickel, even my TRUE is also nickel plated, no idea why "tin" came out