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AMD captures 28.7% market share in desktops
(www.techpowerup.com)
This is a most excellent place for technology news and articles.
And Intel. Intel has been using TSMC fabs for a while.
They used to get a 40% discount, too, but that stopped recently when Pat Gelsinger said people should stop buying from TSMC because there's a good chance they'll be invaded.
TSMC's CEO didn't like that, and said "ok, no more 40% discount for you. Effective immediately." (TL;DR'd, obviously).