My first two racks of dedicated machines are full... with these plus the others scattered around the office / at home I have 101 total GPUs online.
I've swapped cards in a few of the systems earlier to reduce the amount of AMD cards I am running... it's likely I will swap almost all of the AMD cards to GTX 1060s or 1080s.
http://sundownaudio.com/BITCOIN%20PICS/0719171041_resized.jpgThat's a really "hot" rig
Regarding temperature I actually have three heat extractor fans in the ceiling of that corridor in the building + one fan blowing across the left rack (I have a second one to blow across the right rack when I get some time to put it up).
It'll be nice in the winter time to keep that area warm, haha!
