Unity 5.4 in Intel HD - Very Low Framerate

Hello,
First of all, I didn't find proper section to post this so I ended up posting here. My Laptop is HP g62 i3 m 330 (has intel hd -- which one to be exact? IDK either, it just says "Intel HD Graphics"). I had assumed it to be HD 4000 because that's what this G62 usually seems to have.. But Unity Editor says DX11 on DX10 GPU but HD 4000 supports DX11.. so I am not certain either..

I created a new 3D Project and ran the scene in full screen (with only the Directional Light).. about 118 fps.. Then created a cube, the frame rate drops down to 13 fps, disabled vsync, the fps increased to 27.. I have reached the conclusion that the frame rate drops to 13 fps if there is any geometry in front of the Camera. Is there any solution to this?

Specs:
4GB ram
Quad core i3
Windows 7 64 bit (so far I have tried Unity Editor 32 bit version only.. cause my internet is slow)

Thanks..


PS: I did google for about an hour and it's not caused by Power saver mode..