One of my clients sent me a pic of his mine. All of the rigs are mounted in my mining trays (with tops).
The GPUs are all 7950 Radeons (mostly MSI Twin Frozrs). Max hash is currently at around 73MH.

Box fan cooling FTW!

I think that standing air condition helps... Just a smidge.

are those 4 7950s each to make 80 cards in total? IF so you're avg 912 ish MH per card:
A) how did you do that?
B) how much was the cost of the entire Setup including COOLING
C) how long ago was this built? I put the general presumption of 1200 W psu and 24000 Watts constantly from those 20 satellite machines. That is a 57 dollar a day power bill WOW.
[My calculations put it at just under 26K such that:
(HD,Mem,Processor@ $90 1200W PSU @ $179 4 7950s@$900 Mobo@$90 Misc Cost@$5+ Structure,AC,Monitors, Network Components @$20 per machine approximately)*20 units]
Using coinwarz the median number seems to be around 340 dollars per day if you were to cancel out the crazy outlier days, I see ROI in Approximately 77 Days so...WOW!
EDIT: I'm seeing two more rigs on the end so I need to change the multiplier to 22 which changes it to: $28500 nearly - Still though 84 days till PURE profit is not bad at all. HOt DAmn