John Larkin wrote in news: snipped-for-privacy@4ax.com:
I don't think I've ever seen silver used to improve the thermals of a
> semiconductor. The advantage over copper is small.
>
The point was that if you are trying to eek out all your last bits faster (and more expensively, like the diamond), it is better.
And the little gain you spoke of is 5%. That is better than "a small advantage".