I know, but that are the details. It’s
240.
This is a pretty old entry level GPU that has 1/4 of the recommended minimum performance for UE4:
470 was the min spec as of the engine release. It might be more hungry these days.
Do note that the viewport spits out 120 fps by default (I believe this is the default setting), you can cut it to 30fps so the GPU does not have to run at 100% trying to reach that framerate.
Hit tilde to get to the console and punch in: t.MaxFPS 30, see how that works out.