**System Information**
Operating system: Windows 10
Graphics card: NVIdia Quadro M4000 (2x)
**Blender Version**
Broken: 1.80 all Versions since i started tests - 2.79 Dayli Builds (i think it came with support of rendering GPU and CPU together)
Worked: 2.79b official
**Short description of error**
Rendering with Cycles and both GPU's activated stopped Blender GUI without a message
**Exact steps for others to reproduce the error**
Just render a Scene with some Objects - GUI will disappear during rendering or shortly after the rendering. Rendering same Scene without GUI works fine and fast.
{F7664023}