3ds Max unresponsive when UE4 is running

3ds Max 2013 is running very slow and unresponsive when I have UE4 running (even when minimized),.

Anyone with the same problem or know a workaround?

I’ve tried to run 3ds max in DirectX, but the problem is the same. And it’s not because the computer is slow… plenty of CPU, GPUs and Ram to go around.

That works… Ctrl + R toggles the Real-Time render option in the UE4 viewport. and 3ds Max now runs smooth again.

I’ve seen that as well. The way I get around it is to turn off “real time” in the UE4 viewport and minimize the editor. That should allow Max to run at full speed.