They appear to be doing straight-through airflow, with what appears to be a damper system for cool times.
Ambient temps in the area tend to stay below 100F (we've had a HOT summer compared to norms this year in the area but I think we only touched 100 one time - LOTS of days with highs in the 90s though).
It's possible they have some sort of evap system set up at the intake (ref. the Yahoo "chicken coop" data center design), but I suspect they just rely on massive airflow.
Right... But at those temps how can equipment operate? That is quite hot. The building or the air would have to be coming from shaded areas would it not?
Yes I think an evaporated cooling system would work... Can you get constant access to cold water? You should look into it.
100F isn't all that hot - most computers and ASIC will handle that just fine if you don't push them on overclocking super-hard.
The Yahoo server farms in their "chicken coop" design are targeting 85 or 90F input temps as I recall - and those are STANDARD rack-mount systems with the only fans involved the fans in the servers themselves.
They do some interesting air-flow management tricks so they don't need more fans, but the tricks rely on rack-mount servers and wouldn't work for most cryptocoin mining gear (IBeLink or Pinidea would be current exceptions).
Gigabyte's location is less than 10 miles from the Columbia River (I think it's more like 5) in a small city - water availability is not an issue if they wanted to use it.
For evap cooling, "cool" water doesn't MATTER - the heat pulled by just evaporating is more than 100 TIMES the amount of heat to raise the temp of water by one degree.
I tried to sign up for one of their "open houses" but they are "all filled up" on ALL of their current dates.
