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m4v3r1ck

macrumors 68020
Original poster
Nov 2, 2011
2,414
414
The Netherlands
Why is the temp reading and controlling for the PCI fan - Mac Pro 5.1 (2012) / Mac OS X 10.10.5 - so much out of control?

ScreenCap%202017-07-09%20at%2014.59.50_zps42qjano0.png


PCI = yellow line going up and down like a madman! The more straight lines - afterwards - are those for the Mac's own fan control without Macs Fan Control running, wow what a difference for the PCI fan.
ScreenCap%202017-07-09%20at%2015.17.11_zpsqvvd7o5t.png

Could this have anything to do with the fact that my Mac Pro 5.1 was serviced and got all new fans - Apple Care - or is the MFC software at fault here? Help very much appreciated!

Cheers
 
Last edited:

h9826790

macrumors P6
Apr 3, 2014
15,454
7,731
Hong Kong
Why is the temp reading and controlling for the PCI fan - Mac Pro 5.1 (2012) / Mac OS X 10.10.5 - so much out of control?

ScreenCap%202017-07-09%20at%2014.59.50_zps42qjano0.png


PCI = yellow line going up and down like a madman! The more straight lines - afterwards - are those for the Mac's own fan control without Macs Fan Control running, wow what a difference for the PCI fan.
ScreenCap%202017-07-09%20at%2015.17.11_zpsqvvd7o5t.png

Could this have anything to do with the fact that my Mac Pro 5.1 was serviced and got all new fans - Apple Care - or is the MFC software at fault here? Help very much appreciated!

Cheers

Because you made a super sensitive fan profile (370RPM per 1 degree C change). If make your PCIe fan base on the PCIe ambient, but something like lower end 33, upper end 58. Your PCIe fan will be much smoother.

Also, if you have an open fan type graphic card, the PCIe ambient will vary more than the blower type, which also make the PCIe fan more sensitive (with this MacsFanControl setting).
 

m4v3r1ck

macrumors 68020
Original poster
Nov 2, 2011
2,414
414
The Netherlands
Thank you so much for your elaboration and tip! Will tweak the setting and get back to you.

Cheers
[doublepost=1499614831][/doublepost]
Because you made a super sensitive fan profile (370RPM per 1 degree C change). If make your PCIe fan base on the PCIe ambient, but something like lower end 33, upper end 58. Your PCIe fan will be much smoother.

Yes! this did the trick.

ScreenCap%202017-07-09%20at%2018.02.29_zpstxsx9bev.png


Also, if you have an open fan type graphic card, the PCIe ambient will vary more than the blower type, which also make the PCIe fan more sensitive (with this MacsFanControl setting).

I indeed have the EVGA GTX-680-4GB-FTW.

Again thanks for your help!

Cheers
 
Last edited:
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