I have an ASUS N551ZU notebook with switchable graphics, an AMD Radeon R7 integrated GPU and a Radeon R9 M280X discrete GPU. I have the latest version of Windows 10 as well as AMD software installed on my laptop. Unfortunately, for months I couldn't have my games run on the discrete high-performance R9 graphics, even though I have set the power option to High performance. Clean installation of drivers and Windows, updating BIOS, and installing older versions of drivers have not resolved my problem. I've also sent an email to ASUS, and they responded the problem is not of their making. Please help, it's really annoying.
Some system specs:
OS:Windows 10 Pro v.1909 x64
CPU: AMD FX-7600P 12 Compute Cores 4C+8G GPUs: AMD Radeon R7 graphics (Integrated DDR3) + AMD Radeon R9 M280X (Discrete GDDR5)
Driver version: Adrenalin 2020 Edition 20.4.2 Display: 15.6" 16:9 IPS FHD (1920x1080)
Motherboard: ASUSTeK COMPUTER INC. N551ZU BIOS: N551ZU.307
RAM: 8GB Single-Channel DDR3
P.S.: I guess the last time I had no problem dates back to Windows 10 v. 1511. I can attach more detailed information and screenshots if required.