Question What case would fit the RTX 3090?

Thats a madly inaccurate generalisation

There are loads of mid atx cases that can take gpu's upto and over 330mm (13 inch).

I agree - this is how broad, lemming-train thinking begins and perpetuates.

Most readers are playing 'telephone' with the information from forums anyway, so the mildly incorrect data will get construed and simplified from what was originally posted (which is still incorrect) to something that is generally regarded as fact, but is in fact, fiction.
 
Heres one very good case that should fit...

https://www.corsair.com/us/en/Categ...er-Gaming-Case/p/CC-9011181-WW#tab-tech-specs

Maximum GPU Length: 370mm

There are loads to be fair. Virtually anything fairly modern that either has drive cages in the psu shroud or a removable middle drive cage at the front.

That covers virtually every case above $50 that isn't based on an old generic design.

And if you're buying a 3090 I hardly think you'd be skimping on the case
 
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