I bought the hp pavilion 15 cw0509sa laptop in October / 18 and since then I have verified that gaming performance is not compatible with your specs.
I would like to clarify that I am aware that this is not a gaming laptop. However, its specifications allow it to be used in certain games. The performance I'm having in games on my laptop is much lower than that found in benchmarks of laptops of the same configuration. I can cite the example of Fifa 18 game that set up in full HD and low quality runs at 35 fps on average. Other laptops of the same configuration and with the same configuration of the game and executed at 80 fps. My performance is 1/3 of the expected performance.
Using CPU and GPU monitoring software I could see that the game starts with a compatible performance of what was expected, however after two or three minutes the frequency of the GPU drops drastically from approximately 1,000 MHz to 200 to 300 MHz and stabilizes. The frequency of 200 to 300MHz is much lower than the frequency reported in the specifications of AMD that is 1100 MHz.
When I take the laptop out of the socket and it runs on battery only, the GPU frequency increases to 400MHz, improving performance a little. When I turn the power back on, the performance again worsens and the GPU frequency drops back to 200-300 MHz.
Another problem observed is when turning on the laptop. Most of the time the laptop does not recognize the SSD stating that there is no hard disk in the computer (error code 03F0), I have to restart the computer so it can connect normally.
Below I describe all my attempts to fix the problem:
Change the power modes (any option chosen the result is the same).
I updated the BIOS to the latest version available from HP (F.13 Rev.A from Aug 21, 2018).
I upgraded the video drivers to the latest version available from HP (23.20.826.1792 Rev.C from Jun 29, 2018).
Turned on and off HP CoolSense (any option chosen the result is the same).
Windows updated via Windows update (version 1803).
The same problem occurs in every game I've tested. There are reports of numerous cases on the internet like mine, I would like you to inform me how to solve this problem, remembering that AMD does not provide specific drivers for the Ryzen 5 2500u.