You can look this page to see status of your GPU Acceleration with Chrome or Chromium.
If you see something like this:
"Unavailable. Hardware acceleration unavailable" or "Software only" means your GPU Acceleration is disabled.
Well, lets convert this to;
2- Set this settings:
[ON] GPU compositing on all pages
[ON] Threaded compositing
[OFF] Disable accelerated 2D canvas
[OFF] Disable deferred 2D canvas
[OFF] Disable accelerated CSS animations
[ON] GPU Accelerated SVG Filters
[OFF] Disable GPU VSync
[OFF] Disable WebGL
[ON] Enable Encrypted Media Extensions on <video> elements
[ON] Web Audio Input
3- Have fun and if you are paranoid make some tests with this page: