UE4.1 significant framerate drop in Surface 2 Pro

I know Surface 2 Pro (intel HD4400) is not a power house machine.
But I was using UE4.0.2 and it runs at 20FPS and great for me to do some blueprint experiment and learning.
With UE4.1 it goes down to a crawl to 1-3FPS 258ms at all times.
Regardless whether it’s finish compiling shaders or an EMPTY scene.

Unfortunately I’ve migrate my project to 4.1 and now I can’t opened it in 4.0.2
Is the slowness a known issue? Is there something that I need to do that can alleviate this in 4.1?
The graphic quality is set to low and not helping at all.

I check the log, aparently ue4.1 use software render instead of my intel HD. Any way to switch it back or select gpu?

Hi RinDream,

This is already a post on the answerhub, please post your specific concern here. I am closing this thread as a duplicate. Thank you!