First off, don’t start on high settings, on my laptop i usually start at medium and make sure things load nicely before moving on.
Second, I have an ATIV book 8, and if yours is like mine it may have 2 GPU options. One using a local intel one for power saving, and another (your 2 intels) for performance. I actually have to use my laptops specific drivers to choose which ones get used on every application. If you have this, make sure it gets set for your GeForces.
Finally, a problem I discovered with my laptop that’s specific to if you are using the Source version of the engine and building it yourself… MAKE SURE when you load the project in to Visual Studio that you let it IDLE for about 5 minutes before you build. This means AFTER it has loaded all the files. Because I discovered that when I opened the project, it would load additional files in the bottom left corner awhile… then stop. But AFTER it stopped for a minute or two, it starts again adding ADDITIONAL files! UE4 is a HUGE project and sometimes it takes visual studio awhile to process what’s going on. And if I compiled the project before it added every single file, it would actually work okay when I launched it, but have HORRID performance as you describe. After I realized I need to let it sit for awhile before compiling, performance improved and now its great.
So the most important things for my PC - Personalize your Power Settings to make sure it’s on max performance, Check your laptop specific video card drivers to make sure you are using your GeForces, and if you are building the engine yourself ensure you give ample amounts of time between loading the project and compiling.