Unfortunately, I ran this miner and it creates a lot more heat than my Windows miner. I shut it down when my cards were hitting 85° C - I was researching a method to undervolt the core clocks and overclock the memory. The only ways I found were rather cumbersome. So if you figure out a way to tweak the GPU settings in Ubuntu, let me know. Granted, I was running this miner on an inferior test circuit and I did not have a fan directed at it... but the difference was noticeable just placing your hand behind the GPUs. It kept my tech room warm this morning that's for sure!