Why does Google Chrome load the graphics card 9 times more than Opera?

Question

Google Chrome

I have an old Sapphire Radeon HD 5870 graphics card. The rest of the hardware is fine: Core i7 6700, 16GB DDR4, Samsung SSD 850 PRO. Windows 10 x64, regularly updated.
Problem with streaming on twitch. When viewed in opera, the load is 11-13%, in chrome - 99%.
When playing a video on YouTube, chrome loads the video card at first by 44%, after half a minute the load drops to 30-33% and stays at these values. In opera, at first 41%, then fixed at 13%.
In chrome, I have a lot of extensions, but in the incognito tab (without extensions and cookies), the load is the same.
Latest browsers at the time of writing.
Opera: Stable 43.0.2442.1144 (PGO).
Chrome: 57.0.2987.110
Video card drivers are also the latest version.
Why is this happening and how to reduce the load?

Answer 1

1. Download the native twitch client and watch in the VLC player (for example).
Much faster and easier.
2. Chrome flags: https://beebom.com/chrome-flags-guide-to-enhance-w...

Answer 2

mining?!

Answer 3

I struggled with the same problem for a long time. It seems the reason lies in the Radeon
Switched to the video card built into the mother and chrome flies.