Currently I have 2 GPUs installed in my system: GTX 650 Ti and GTX 750 Ti. To this day I could only use the first one in Octane because GTX 750 Ti is based on new line of Maxwell GPUs which was not supported in earlier releases of Octane Render.
To my dissapointment I noticed Ocatane for Poser plugin can't recognize GTX 750 Ti even with Ocatne Render 1.54 installed

Here's my log:
Started logging on 30.05.14 21:36:33
OctaneRender version 1.52 (1520000)
CUDA device 1: Failed to find a CUDA binary matching compute model 5.0
CUDA device 1: Failed to find a CUDA binary matching compute model 5.0
Are You going to realease an update for Octane for Poser Plugin any time soon to support Maxwell GPUs along with Octane Render 1.54?