Sanctyy wrote Define R5 fan positions;
top- 3x140mm or 3x120mm
front- 3x120mm or 2x140mm
rear- 120mm or 140mm
bottom- 2x120mm
side- 120/140mm

So, run 3x120's in the front as intake, 2x140's in the top as exhaust and a 120 or 140 in the back as exhaust.

These for 120mm;
[ Register or Signin to view external links. ]
I'm getting 3 of these in red for my own rig.
and for 140mm's, something like this;
[ Register or Signin to view external links. ]