Questions about Corsair Carbide Air 240

Yes.

According to the information at Digitec, the card does not fit in terms of length. In width it would probably just fit. Card width 120mm, max CPU height (which is also the width of the graphics card) 120mm.

Only a graphics card with a max. length of 290 mm fits in this case - the 1080 Strix is 298 mm long, which is too long. If I were you, I would choose a different case because I couldn't do without my 1080.