As far as I know, the fans are controlled by the “System Management Controller” (SMC).
Not sure if it helps, but have you tried and reset the SMC...?
I replaced the GT 120 with the GTX 285 and have experienced only occasionally
an increase (double as usual) in fan speed...
Hi, thanks for the prompt answer, yes I've tried resetting the SMC multiple times but nothing have changed. I've reinstalled the whole Mac OS X multiple times, starting from scratch, I've tried with 10.6.6 and 10.6.7 with the latest NVIDIA Drives and CUDA but nothing, always the same problem. I think there is an incompatibility between the Card and the Computer.
Something else I can add, is that randomly the fan speed will go down, but after a reboot will start again the problem, If I keep the computer on just using Sleep, there will be no problem. The other day I noticed that after running OpenGL Extensions Viewer program it started going down the fan speed and the problem got fixed, it's super weird. I spent 2 hours today with Apple support and the only conclusion was change the card, but it is working fine, I've used in PS CS5 and Premiere CS5 with no problems, as a matter of fact in Premiere is using all the CUDA processing power with no problem at all, so the card should be fine.
Sorry, that I can’t really offer much help...
Did you install the latest “standalone” driver update...?
Should be currently: GPU “256.01.00f03v7”... CUDA “4.0.14".
The driver has to be present before the card is installed...
Check your latest Mac Pro EFI Firmware update... should be version 1.4.
Run a general maintenance utility like, OnyX, Cocktail, TechTool Pro, Disk Warrior etc.
Restart your system...
Yes, I've done it multiple times, and it will work fine with the GT120. As a matter of fact today I installed an ATI 5870 and it has been working flawlesly for the last 4 hours, with no Fan acceleration, so clearly there is something wrong between the Nvidia card and Mac Pro, I think I am going to return the Quadro 4000 and keep the ATI 5870. The only tradeoff will be no GPU acceleration within Premiere.
Is PRAM reset equivalent to Reboot and then Option + Command + P + Q ?, if th answer is yes, yes we did it like 5 times when I was troubleshooting with Apple. Did not solve the problem. After 10 hours with the ATI 5870 everything is fine. Clearly Apple support with ATI this time is much better. There seems to be a gap with NVIDIA, those drivers should have been embeded and fully tested withing Mac OS X 10.6.7. It's a shame because I really like the Quadro 4000 card, especially for the use with Adobe Premiere CS5.
I know it's quite late but I bought the card a couple of weeks ago and ran into the same problems. The only fix is to fire up Adobe Premiere after startup and let it play an RED R3D file in the timeline. After that the fan is decreasing back to 800 RPM and it stays there for the whole time.
It seems as the card need to be used. How did you fix the problem?
Mac Pro 12 Core 2.93 / Slot 1: ATI 5870 / Slot 2: Quadro 4000
I just purchased a 12 Core Mac pro 2.93 which had the stock ATI card in it. It is replacing a Mac Pro 2008 and I took out the Nvidia Quadro 4000 from my 2008 Mac and replaced the ATI card. Everything works fine but I notice that there is a lot more fan noise with the Quadro 4000 than the stock ATI card. The Quadro in my 2008 mac pro didn't make excessive fan sound, it was pretty quiet. I haven't determined if it is the fan on the Quadro card or something else in the Mac Pro. The stock ATI card didn't generate this noise so the Nvidia Quadro 4000 is the trigger.
I tried the Open GL utilities to stress the Quadro but didn't work.
I did a SMC reset, no change.
Any clues anybody else? I have not yet done a NVRAM reset.
Thanks much for any advice.
I just read on MacRumors about Q4 fan noise under 10.8, and could be CS6 3D and being stressed or even "immature drivers" in 10.8 too.
"tried OpenGL stress test didn't work" - expand; that means _____ ?
GTX cards are not hugely beneficial for OpenCL, but they have the luxury of being both OpenCL and CUDA - whereas the AMD 7xxx numbers are huge in OpenGL but at the cost of any CUDA support.
GTX 680 Performance thread: (goes off in other directions too)