So with the 3080 just announced, the only info I can find on physical size is that the card'll be L:285mm by W:112mm which is 15mm extra length. Think it'll fit with the stock air (foundation) or once a waterblock is announced (assuming an EKWB is of similar size)?
I can't recall the site as I have been bouncing around (will update once I find it again) however they stated both 3080 and 3070 foundation cards will fit in stock configuration.