Welcome! 
Sounds strange, could you probably post this on answerhub: https://answers.unrealengine/ 
Make sure to check the temp of your GPU. Also change the quality settings of the engine to low and see if you can get over the 3 minutes
Welcome!
Sounds strange, could you probably post this on answerhub: https://answers.unrealengine/
Make sure to check the temp of your GPU. Also change the quality settings of the engine to low and see if you can get over the 3 minutes