This is puzzling me, I've got a 3570k and Z77 Wifi Board (with the atheros Wifi Card replacing the centrino) and Nvidia 660Ti, everything worked fine, including sound, and was installed using the no DSDT method outlined at the start of this thread. I upgraded to 10.8.2 as soon as I installed the build and re-ran Multibeast and everything was still fine in November and has been fine until now, but in the last day or so, I've now got no sound. I've tried re-installing the Multibeast Sound, removing the kexts that are modified and starting over, and everything in between but still no sound. All my sound devices are showing in sys profiler and sys prefs and nothing has changed with the install in that time. I have another identical machine with a i3 3225 which is exactly the same apart from the processor and only having 8Gb Ram instead of 16, and this has had all the same updates installed and no issues.
Where do I start to troubleshoot this?