I tried to change it in Nvidia Control Panel but it didnt seem to work. It works with games but not with UE4Editor…
I found it worked automatically, you should be able to add the editor exe to the list of applications to use.
Otherwise there’s also right click, I think if you right click on UE4Editor you can also select run using Nvidia.
I assume it’s a laptop? Make sure that the power cord is plugged in and your power settings are on performance.
If it’s a desktop, you need to plug the monitor into the GPU connector.