Pix4D has trouble accessing the second GPU

Hi, 

I have noticed that Pix4D has trouble accessing the second GPU (on a Win server 2012 R2 with two NVIDIA Quadro M6000 24Gb and latest NVIDIA 390.77 driver) when the first GPU has CUDA disabled (and OpenGL enabled). Essentially I never see any utilization of the second GPU in this scenario, and the processing takes excruciatingly long. Has anyone experienced this issue before? I’d appreciate any help.

Thanks,

Yuri