If you have Poser 11 Pro, you can enable GPU rendering in the Render Preferences, Superfly tab, at the right side at the top of the tab. You know that you render with GPU when you see just one bucket render at a time, the CPU version uses more than one usually.

Octane is still faster than Superfly / Cycles, That's nothing new, you can read comparisons in the Blender community.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.