I can't choose render device in property window I'm using Blender 2.78. I choose CUDA (Nvidia Geforce 940MX) as compute device in User preferences > System > compute device. 
But everytime I render, blender uses CPU instead of Graphic card for rendering.

Then, I searched around the web, and I found out there is an option to choose render device in property window in others, but not mine (As shown in picture).
Is there any other way to use GPU for rendering, or is there any other option to choose render device.


P.S 
Geforce 940MX support CUDA. 
My graphic memory is more than rendering memory.
I already chose CUDA as compute device and made default, in user preferences.
I have latest graphic driver.
I am using Windows 10 v1703. 
I tried to run as administrator and run with graphic processor.
Thanks.
Alexander Beatson
Change Blender Render to Cycles Render