Just noticed that the fan runs loud and constantly when I open a browser like firefox or safari. So I installed macs fan control. See attached. The PCI and PS(Not sure what PS is.?) seems to be running high for some reason and then slows down. I have OSX sierra. The main OSX is on a pcie ssd. The graphics card is an amd 7950 and is the only graphics installed. See attached image of what I see in the system report. The fans are quite now but they do run high when you open browser or some small app. not sure if i have to be concerned.