[frognumber]

3 second with a web search would bring up citations:

https://duckduckgo.com/?t=ffab&q=gpu+lifespan&ia=web

You'll need to scroll past the ones talking about obsolescence versus failure. Toss in 'data center' if you like.

You'll see a range of numbers -- including some lower than I cited -- but it's all in that ballpark.