On 14/01/12 15:55, Paul Davis wrote: It is a ASUS M4A785TD-M EVO motherboard whose BIOS has C1E enable/disable option exposed. It does not feel good to be missing on power savings though. When I find some time I plan to dig for a better solution. Tvrtko P.S. I seems that my yesterday's post with the attached screen shot showing the distortion did not make it to the list. I basically played a sine wave to pcm0&1 channels and captured channels 11&12 (which is digital mixer). With that I proved that the corruption can only be in the driver or in the PCM submission hardware (lets call it like that, without knowing the ICE1712 architecture). Basically nature of distortion is quite weird in that one to two samples every now and then get slightly wrong values (not zero or max). This behaviour lasts for a random number of seconds and goes away and back similarly.