Something happened with the last update and every model I have used, including colorization does not utilize the GPU like it used to in the previous version. GPU stays under 10% utilization, to color a 1080×720 20 second clip it used to take about 10 - 20 seconds, not it takes 45 minutes.
I verified after reinstalling GPU drivers that it is set to use GPU, yet it doesn’t it uses more CPU than GPU. Something is broken making this software nearly useless.