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Actually what is really odd, no heat at all out of this setup lol. I must have spaced them just right because my hottest card, one of the GTX 1080 TI's is maxing out at only 47 C but I have also put liquid metal in these, I found doing that really helps keep longevity on cards you mine with, just have to keep checks on them every 6 months or so and reapply.

The fans I have on there, they literally never run, I have them on a curve to kick in 100% when it tops above 55 C seeing usually when it hits around there it climbs fast. So far though really good, hasn't had to turn them on yet at all. Before I had them pretty close together and it really heated up the house but with this set up its been doing well all week.