Hi there. Got my 27" 2017 3.5GHz i5 (500SSD) Mac delivered to replace my ageing Late 2009. Love the machine in general, but I am uneasy about the IDLE sound of the fan. I checked and it's currently at 1200rpm but I can easily hear it from a good 1.5m in front of the screen. Now, I read the forums and know there is a constant fan noise to be expected but the biggest reason for me to get the 2017 was that my 2009 was getting really loud and I want to have a really quiet work machine (writing). That's actually one reason I went for the mid-tier i5 (575gfx)... I don't mind it speeding up if doing serious work, but at 1200rpm and IDLE I expect it to be silent if I'm typing in front of it... I do not get any clicking but it definitively feels louder than my 2013 model at work and also a bit louder than my Dads' iMac 27 2015... Really frustrated. One hope would be that the 2018 upgrade get's better airflow design... I’d return this and wait for that if there’s a chance it is more quiet Before returning it I wanted to ask if there is a tool or hack to get the rpm of the fan down to 1000rpm? I just want to test if this would be enough for me to keep it - temperatures here a no problem and system temps are also pretty low at 1200rpms.