As a follow up, I have used GPU Tweak III and that's what I get:
https://imgur.com/a/mVRbyX5It looks like the left/right fans are not controllable. Is this something that you guys have experienced or normal at all?
EDIT: on Afterburner, I just tried to set the Fan 1 first and Fan 2 afterwards at 0 speed till 60 degrees and I have noticed that on both cases, the only fan that stops is the middle one. So Afterburner doesn't seem to be able to control left/right at all.