The prices on the 580s have gone up by at least 50% of what I was getting them for.
One of my ideas wasn't to exactly water cool the GPUs themselves but to do something similar using geothermal. I have a backhoe so digging ain't a problem, ya know? I was going to bury a 2k-3k gallon reservoir, run a bunch of pex and then pump that through a series of radiators (having a former automotive shop I have a lot laying around). The radiators would be in essence a precooler for my geothermal heat pump that will only work in AC. The colder the incoming air to the exchanger, the cooler the ouput will be. If I can take 105 degree Texas summer heat (or even the exhaust output of a closed loop system) and turn it into 80 or 85 degree air before it hits the AC system, my AC system will be way more efficient. I have the majority of the items already to make the precooler, and even the AC system. Just need time.
I started this venture in January so I have no idea how I'm going to cope with the heat. Painting the containers a semi gloss white has definitely helped cut down heat absorption and I expect the solar shade to equally help.
If you wouldn't mind, I might need a copy of that script you wrote!
