[QUOTE=mlknez;93868]When I try to do a Blu-ray to DVD, File convert, DVD Rip, or a Blu-ray rip, my i7 processor is pegged at nearly 100% use, while my Nvidia GeForce GTX570 is close to 0% utilization.  I have CUDA enabled for video decoders and encoder.  Why is it not using my GPU?  Is there some additional settings I should have changed?[/QUOTE]
I'm finding .5.9 has increased my cpu's load to 90%+ at all times durring a bluray rip. The GPU doesn't even make a blip here and there, just a solid flat line at 0%.
This is on my ATI 5800 series cards which already sucked bad enough when it came to GPU support. Now with this version it's non existant. Doesn't seem to matter which type of video it is either H.264, VC1 or MPEG. 
Also the time taken to do Rips has more than doubled in length, even though I'm now using the Fast Speed/Normal Quality Encoding setting. When with 8.1.3.8, I was able to rip the video in a decent time frame using Slow Speed / High Quality Encoding settings.
I've tried with Turbo enable and disable and left the memory usage at auto.
So now I'm being forced to roll back to version 5.1.3.8 if I want good rips in less than 4 hours.
Having tried 8.1.5.9 on a comp with an nVidia GTX560Ti I do see some usage of the gpu but only the h.264 show a 30% gpu usage while the VC1 and MPEG only get up to about an 8% usage for the odd blip here and there runing at a steady 3% usage.