Originally posted by: gibster
Anybody know how to set the fan speeds reliably for the 8800GT in RivaTuner? I can set 1 speed for all 3 (2D, low 3D, high 3D), because the settings are grayed out for anything other than high 3D. Low level fan control also seems horked up (maybe b/c RivaTuner has not released an updated version, but still...). Do I need to use nTune? I want to set my speeds at something like 25/50/75.
To answer my own question, also hopefully to somebody else's benefit, I found out that one can set up the fans in RivaTuner to go to different levels depending on the temperature of the GPU. The process is fairly convoluted, but it seems to do the trick, search the web for tutorials. After some testing, I set up 3 zones - below 55C (at 50%), between 55C and 65C (at 75%), and over 65C (at 100%). I figured there is no reason to go below 50%, might as well have the fan do the work. Seems to actually idle at 55C, so it's right at the threshold between 2 zones (although changing the thresholds/fan speeds makes the idle temp creep toward the threshold anyway, so I guess I'll leave it as is, where it bounces between 50% and 75%).
One thing that got me worried was that when I was playing with the fan speeds and running some benchmarks to make the temp go higher, I got artifacts in 3D03, and a hard lockup afterwards. The fan was probably at 25% or 50% at that time, and last temp I saw was 67C, but the problem would have been caused by memory anyway, I suppose. I ran several 3D03 and 3D05 tests before and after, and only the one produced artifacts. Wonder if it's because of the OC memory - maybe my modules cannot handle that OC speed. I'll test them out with the nVidia OC test, maybe this will give me an answer...