Normal
You can do it in a louque s1 with two top hats. there are some vids on youtube showing this. Also winter one come to mind https://smallformfactor.net/forum/threads/winter-one-15-6l-sff-case-3090-support-3-slot-gpus-dual-280mm-radiators-cfd-optimized-design.11601/ and with some effort some people have done a dual 280 rad in a sliger sm580
