I'm on a Compaq 615 and it's fan is loud. Not much you can do about that but I'm trying to keep the CPU/GPU as cool as possible. This is what Powertop has to say:
If I change all of them to "good", the changes don't survive a reboot.
I added the line to the "grub"-file as suggested here
How do I make the Powertop suggested "Tunables" permanent?