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Re:Google removes SIMD.js support from Chromium by johnsmith21006 on Sunday June 04, 2017 @05:19PM (#14483564)
AlphaGo does not use GPUs but instead the TPUs.

"AlphaGo was powered by TPUs in the matches against Go world champion, Lee Sedol, enabling it to "think" much faster and look farther ahead between moves."

Re:Google removes SIMD.js support from Chromium by Houshalter on Sunday June 04, 2017 @07:45PM (#14484363)
It used to use GPUs for training because I don't think the first gen TPUs could do training.