You are correct, the enterprise Ampere A100 is on the TSMC 7nm process. I should have been clearer that I was referring to the consumer Ampere GeForce cards due later this year.

The 8nm rumors have been widely reported[1] but at this point are just that, rumours.

[1] https://www.tweaktown.com/news/73592/nvidias-ampere-geforce-...