Old 8600GT - should clock scaling work?

[mixie]

Hi... 10.8.5, Chimera 3.0.1, GraphicsEnabler=No, Kernel Flag -xcpm. I have working two monitors on HD4000 and one on 8600GT. Problem is the 8600GT stays at top clock (540Mhz) and is always about 68 degrees C! Uses a lot of power also. I searched the forum and tried a few things but nothing worked. Before I continue the search I wondered if anyone here can tell me if it's even possible to get this old GPU to go into lower power states on OS X. It is device ID 10de 0402. Thanks!

 

[mixie]

I'll answer my own question -- it seems not. Evidence is when I changed the old 8600-GT out for a new GTX-760 core and memory speed of the card seemed to be scaling fine, at least with one monitor attached to it. I now have three attached to the 760 and idle clocks are higher than I'd like, but it could be normal. I think I'll post a separate thread for that.

For posterity, my signature with more system info at the time of writing this post was:

Gigabyte GA-Z77x-UD5H, F14, turbo oc 4.2 max, i7-i3770k. • HD4000 graphics driving two 1920x1200 monitors • Ancient passive cooled nVidia 8600GT - driving one 1920x1200 monitor

10.8.5 • Chimera 3.0.1 • In testing, but currently using iMac13,2 system definition with no DSDT and patched SSDT, with Kernel Flag -xcmp, GraphicsEnabler=No. CPU scaling seems to be working fine.