Try following these instructions from AMD Forum on how to install AMD drivers and how to configure your switchable graphics on your laptop:
It is best to download and install the AMD drivers from Lenovo for your laptop. Also make sure you have the latest BIOS and Chipset for your Laptop installed from Lenovo Support.
You need to download the APU driver from AMD Support. This is the generic driver for your Laptop : APU
Found this at Lenovo Support for Laptop Y700-15acz :laptops and netbooks :: ideapad y series laptops :: y700 15acz :: 80ny Lenovo PC Support
It has a newer BIOS than the one you have installed IF THIS IS THE CORRECT LAPTOP MODEL AND MAKE!
- BIOS Update for Windows 7 (64-bit), Windows 8.1 (64-bit), Windows 10 (64-bit) - ideapad Y700-15ACZ
- 17 Oct 2016
- AMD VGA Driver for Windows 10 (64-bit) - ideapad Y700-15ACZ
- AMD VGA_21.19.512.0
- 18 Sep 2017
The article https://community.amd.com/docs/DOC-1581 is good. The only problem - my 'Radeon settings' has version 20108.0216.1847.33779 and doesn't have neither 'additional settings' now 'switchable application settings'! So the question appeared again - how to switch between Intel and AMD graphics?! I have Windows 10 Pro, AMD HD 8790M, Dell E8540.
Why?! Why AMD always change GUI?! it was before Catalyst Control Center then Radeon Settings, Please be consistent!
Both settings (Switchable Application Setting and Switchable Application
Monitor) are in the most recent compatible Radeon Settings.
I tried the fresh install of the Drivers provided by Lenovo, then installed
the Generic APU driver from AMD on top of that but have seen no changes in
Games that I surpass the Recommended specifications for with my Discrete
GPU are stuttery and sometimes unplayable at anything other than the lowest