Similar multi-GPU issue. I can't get Octane to use all three GPUs.

Here's another data point:

I am on the bleeding edge and running CUDA 3.1b, Driver 257.19.

I have 3 cards: 2 x GT240's with monitors connected. 1 GTX 470 without a monitor.

All 3 cards are recognized by Octane and I am able to ...