I installed a HDD+SSD setup on this MacBook Pro 15" Late 2011.
At first I installed the SSD where the Superdrive was with an optical bay HDD caddy, but then I saw in System Informations -> SATA that while the speed link was 6 Gigabit, the negotiated speed was 3 Gigabit.
So I swapped the location of the HDD and SSD putting the HDD in the caddy. I was getting much better performances (booting Sierra in 18 seconds, instead of 30 seconds when it was in the Superdrive location).
The problem is, as soon as I make the smallest action (like opening Finder), the fans start going at 2000 RPM (which seems to be the minimum speed on this machine) and you can always hear them in background.
When I leave the MBP alone for 10 minutes, it becomes quiet again (you can't hear anything) but as soon as I start the simplest application, there go the fans at 2000 RPM.
That's strange because my other MacBook Pro (Mid 2010) is always quiet while I work, you start hearing the fans only under load.
What I already tried:
- Resetting NVRAM and SMC
- Using all popular fan control programs
- Checking the temperatures (always very low)
Sierra is a clean installation. What am I missing?
One thing that I like in Macs is that you never hear the fans while you work. I'd like it to be like that.