Make sure that you are not controlling with the Windows Remote Desktop tool, particularly on Windows® 10 systems. This method allocates one GPUThe GPU is responsible for displaying graphical elements on a computer display. The GPU plays a key role in the Octane rendering process as the CUDA cores are utilized during the rendering process. to the session, causing OctaneRender to see one GPU over the entire network.
You can not activate devices by specifying GPUs directly if these are not activated automatically. If there are some underlying issues in the system already, then devices register inconsistently during startup.
Try unplugging some of the GPUs to see if the computer works fine with less cards, then add more one-by-one to know when the network and system begins to fail. It's possible that there is a defective network cable that pulls connection speed down to unexpected lows.
Make sure no other program is running on the Render Node or Primary Node machine that could obstruct signals or cause heartbeats to stop. This is the result of antivirus software or the Windows® OS Security measures, which may kill normal operations once it suspects these operations are similar to a computer virus.
Ensure that the Render Node daemons in the Render Node machines have appropriate permissions. Try running the Render Node daemons with administrative rights (right click then click on Run As Administrator).
For other issues, consult the OctaneRender community board and forums, or contact [email protected].