Constant Fan Speeds or Custom Fan Control

I am currently mining Ethereum running my fans at 80% constantly. I have read some people say yes running around there is good and I have also read people say to put a custom fan control on (Typically via Afterburner). I use 2 FTW 3071MB NVIDIA GeForce GTX 1080 Ti’s (Evega). 1 for whatever reason runs 20 degrees cooler than the other. Like right now 1st one while mining is at 59C and the 2nd one is at 77C. Thoughts on fan controls?

Consider repasting the hot one… Seriously, I did that to my hot ones and the temps dropped a lot.