[James Linehan]

I have 3 GPUs in my computer 2 are GeForce RTX one is a Maxwell Titan card. I can't find the place to set the GPU because the RTX cards don't work

[dmeyer]

Neither RTX nor multi-GPU of any kind is supported in the current release build. Basically you can use either a single Maxwell or Pascal GPU.

[gloomer]

even single GPU is not supported in a while