Hi, after updating to iClone 7.9 and updating to the latest NVidia drivers it seems to be ok now. Thanks. The log wasn't showing anything relevant - it said it was using the GPU, but it wasn't showing in Windows Task Manager and other tools. It's showing ok now in Task Manager. Interestingly it was using all my CPU cores before (ignoring the settings I had made under "Hardware Settings"), now it is sticking to the single core I assigned to it. Thanks for reminding me about the log, I found this information about the cores there. The log as shown in the screenshot is different from the log you get at the end, by the way. So, from my perspective, this can be close.
could you provide IRAY Render log