The lowest temperature is the one at which it runs the fan at minimum speed (800 RPM), and the highest is the one at which it runs at maximum (4500 RPM). It’s the fan that blows over the PCI cards, so set the sensor to “PCIE Ambient”. * Click on PCI: Custom…, and select “Sensor-based value”.
MACS FAN CONTROL SERIAL SOFTWARE
Oh well… it's nice to have the software quickly available if the machine ever makes noise for another reason. * Click on Preferences, and enable “General: Autostart minimized with system.” Unfortunately there is no way to hide the menubar icon, so it sits there as a constant reminder that the fans need assistance.
MACS FAN CONTROL SERIAL PRO
Mac Pro 2009 Setup (5.1-flashed), with an nVidia GTX 960, El Capitan and Macs Fan Control: Either way, the only fix is to correct the fan behavior by changing the operating temperature range of the fan speed. Oddly enough, the PCIE Ambient temperature isn’t even high for me (about 30*C), so I don’t know why the PCI fan sped up so much in the Mac Pro. In my case, a new, passively-cooled GTX graphics card is causing the case fans to spin up to an extreme amount because it raises the PCI ambient temperature a bit more than the old cards the system came with.Īdjusting the fan behavior is the only proper forever-fix for this problem for all us upgraders. It's unfortunately necessary software when installing 3rd party components in Mac Pros. It's crazy that it's free since it's easy to use and well designed and they even updated their Fan Control software to El Capitan very soon after its release, so they're trustworthy and reliable. It's by the same people who made AnyToISO.
This free software is actively maintained and signed by a professional software company and is the most advanced of all fan control software for Macs (the only software that lets you change minimum fan speed dynamically). But screw doing that after every cold reboot! That would get tedious fast. Some people have discovered that running and then closing a 3D application after every cold reboot would get their PCI "non-EFI" graphics cards into a colder/power-saving mode, which makes the Mac Pro fans silent again. The sensitivity range was tuned for the super-cold, old graphics cards the system shipped with. The temperature sensors in the Mac Pro are not tuned for things like modern nVIDIA graphics cards and certain SSDs or HDs, and will ramp up the fans tremendously, even though the temperatures are low.
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