Bob, do you have access to a crawl space under your house, or a shaded area near your computer room? You could manage to do an external radiator with an outdoor rated fan, run a loop from that radiator to a small radiator in a small ice chest in your room, and run another loop from the PC into a radiator in that ice chest. Filled with water, you'll be able to run lower quality liquid in the long outside loop and high purity liquid in the inside one. The outdoor radiator can even be a junkyard car radiator.
Obviously, there will be a floor temperature that's a few degrees above ambient outside. If you want to go below ambient, you'll have to go below ground. Dig a nice pit or trench and run a coil or series of loops of copper tubing in it, fill with sand/sandy soil. You'll need to get a few feet down to get decent thermal difference from the air. If you can, it'll help thermal conductivity of the tubing for it to be saturated with water often. You can setup the drain from the bathroom wash basin and even the shower to run off into that area to keep it moistened without discharging sewage or having to use extra water.
Appreciate the suggestion but unfortunately I live in a condo. No crawl space below and a small one above the bedrooms but it is hotter than h3ll up there. Unfortunately, even the coldest part of the day we are still @ ~90F from ~May to Sept, give or take a few days. The rest of year I do not think heat would be an issue. The other issue is that this would have to be be a rather hidden setup as with the lack of space, my wife really wouldn't be too happy with what you are describing, not trying to sound like a d!ck to you as I appreciate the suggestion, but I just know what would and would not fly with her.
The other option I have run into is the price of the gpus, everything is @ MSRP or higher or OOS. Those parts can be overcome with patience, but unfortunately running a liquid cooling setup to the outside patio is definitely not going to go over with my wife. Unfortunately, what I run (if I can even get to that point) has to basically be done on air, because even if I went w/ a large liquid cooling setup, running 24/7, I would think that after a day, the radiatory wouldn't be able to really cool the liquid much, even with a very large radiator, but even if it did, the heat will still be put out into the room. Don't get me wrong, the condo is air conditioned, but if I have to take that a/c electricity into account, there is no way I will come close to break even, let alone a profit unless whatever I mine goes nuts like BTC.
I am still looking and trying to figure out if this is even a possibility from a ROI perspective. The only positive is that the office does not get used that much, so unless the heat is pouring out of that room, it may be a non-issue. Again this would limit the amount of gpus I could use, which with even the newest, most efficient units, I think is 4, which would also work in the rig in sigs m/b. I could put in the lowest power cpu and modify the case to all 92-120mm fans (its an OLD (read beige), large mid-size case) or design and have built a custom, mining case (which wouldn't cost anything, but time as a friend owns a aerospace machine shop or I could make it myself from the 80/20 Al stuff).
From what I have read, which is not near as much as many of you, ETH seems to be where it is at at the moment, but what is the best OS to run this stuff on? Win7 or 10? I have read that some of the ATI cards can actually be undervolted a bit and underclocked without much of a hit, so I am going into this thinking I could at least run the card @ normal speeds and not need to o/c it to insane speeds, but again, this is just my conclusion from the small bit of reading I have done.
Appreciate the suggestion, I am not quite out but am thinking of ways to at least give it some sort of try. I have some things to sell just off the top of my head, sitting here collecting dust that would cover at least 1 decent gpu and a quality psu, thinking in the 750-1000W range. I have a couple server psus that are rated @ near 75-85A on the 12V rail on 110V, but I do not know their efficiency. I bought them a couple years ago when I was heavily into multirotors as a source for clean 12V for charging multiple lipos at the same time. Due to what the FAA did, I just didn't want to deal w/ their BS as I live rather close to a large municipal airport that is home to A LOT of business jets. I have no issue soldering large copper wire to the blades on the back of the psus as I have the output sheets, but I don't know if I would be better off just getting at least a bronze 750-1000W psu and start off w/ possibly 1 gpu and see how things go? Need to do some research on hashrates for the different gpus as since I will be thermally limited, I have to get the most efficient gpus. Figure the main computer would just use 50W or less, then the gpus would take 200W+ each, if not more.
EDIT: After reading the in GeoThermal setup, I do not have the space to do what was done - again, condo w/ a little backyard that is large enough for my dogs (2 Miniature Poodles) to do their business in. Plus, I do not have the equipment or back to do what was described. Appreciate the suggestion though and for helping me think outside the box.
Appreciate the suggestion,
Bob