Re: Difference between Radeon 5870 and Quadro 4000 and just the Radeon 5870

Sascha thank you for the test! Will run it over the weekend ...

Concerning the noise, this is really strange, when I start up the Mac Pro the expansion slot fan is going up to 1900 RPM. (normal without Q4000 it's around 800 RPM). When I start to use the GPU but just when I use the GPU the expansion slot fan goes back to normal behavior.

So my startup with the Q4000 looks like the following: I boot up and start Premiere (Mercury enabled) play a native RED file with some effects applied to it and voila the fan goes down to it's normal state around 800 RPM.

One would think that the fan is going crazy when the card is used most but this is not the case. It needs to be used. There was a thread to this in the NVIDIA forums where other people reported the same behavior. I reckon it has to do with the NVIDIA drivers ...

The system is running on 10.6.8 with the latest drivers for the Q4000 (general and Cuda).

I really enjoy working with my system when it's quiet. It works with the Q4000 but the procedure is to get quiet is really annoying.

Tips are very welcome.

Thank you!