Yes.  Measured exactly 285w with a kill-a-watt.  How much power do you think it takes to drive a 5500CFM fan and a small water pump?  Certainly not more than this.  On really dry/hot summer days, my cooler will drop the air temperature over 20 degrees ferenheit (6.6 celsius).


Yes, I need to add in the power from some of my fans.  I was keeping things simple just to compare evap vs AC.


I only pay 0.104377usd per kw during the day.  At night and on weekends, I pay 0.038162usd per kw.  In another month, the air temperature outside will be so cold that I wont need the evap cooler anymore.


Most of my GPUs are running around 65c and 67c.  There are a few that are hitting 75c.  The air coming off of the heatsinks is much cooler.  I doubt the caps are getting that hot.  Besides...  why would I keep these cards for years?  That wouldn't be very smart to not sell them and upgrade eventually.


I have more than 30 cards.  Pumps aren't free.  Car/truck radiators aren't free.  I'd still have to run water lines outside and keep them from freezing if the power ever went out.  Temperatures have hit -10C here before.  Lastly, my TIME isn't free and it will be difficult to sell 50 water blocks when I'm done with these cards.  The 7000 series will be out by then and people wont be looking for 6000 series waterblocks.


For my main machine at home?  Yep.  It's been water cooled for years.  Definitely not for my Bitcoin rigs though.  Too expensive.


But I don't. 


But I wont! 

At the current difficulty, Bitcoin would have to drop under $2.5 for my rigs to to be unprofitable in the summer.  It would have to drop under $2 for it to be unprofitable in the winter.