This is a Macbook Pro 15" Retina from 2013 (11,3). After switching my SSD for a new one, the fans started to behave wildly, spinning constantly at ~6000rpm. If I use a fan control app I can keep them in the 3000 range, which is silent, and there will be no heating whatsoever.
If I switch back to the previous SSD, fans behave normally, with low speeds on Auto and light processing load. Upon switching back to the new one, again I get high speed fans.
I've tried: PRAM reset, SMC reset, OS reinstall from scratch.
What could explain this behavior?