Hey everyone! Recently bought a Mac Pro with a W3565. Thought I would get the most out of my system so upgraded to W3690. It was my first time applying thermal paste (watched youtube guides) and I think it went pretty well. Thought I would be safe about the installation so installed "Macs Fan Control". I read online about CPU stress test and this is the result after 12 * "yes > /dev/null &" in terminal for 25 minutes. Do you think it looks fine? ? ? In terms of the fans I observed the following when "CPU A core from PCECI" got close to 100C: EXHAUST 600 RPM --> 800 RPM, approximately INTAKE 600 RPM --> 800 RPM, approximately BOOSTA 800 RPM --> 1200 RPM, approximately After 10 seconds the system sort of stabilized and the 3 fans slowed down a bit as seen on the picture. Overall I think that the fans of the system are working properly since they also slow down to stock RPM as soon as the heavy CPU load is cancelled. I have attached a picture of the idle temperatures to - If something looks weird please do tell ! Any point in messing with settings of the fans "custom" vs "auto" unless you have installed another GPU and experience problems with "PCI" & "PS" fans (read that one thread the other day) ? ? ? Thanks in advance !