MacBook Pro 2011 - Safari doesn't display videos properly

[Andy_yy]

Hi,

I have MacBook Pro 2011 i5.
Safari doesn't display videos properly. But Chrome displays the same videos properly.
Please check attached photos. Left side - Chrome, right side - Safari.



I installed fresh copy of MacOS (El Capitan, Sierra, High Sierra) but it didn't resolve this problem.
I also replaced the HDD and instaled MacOS on blank HDD. Safari still doesn't display videos properly.
I did reset NVRAM and SMC.
Could you help me?

 

[Ries]

Most likely chrome does VP9 codec software decoded and safari x264 hardware accelerated. Check CPU load, if it differs greatly between them, it's your dedicated GPU dying.

 

[WhoNet]

Safari uses your Intel HD graphics and Chrome uses your AMD Radeon. Read somewhere Chrome dropped
support for the Intel card on the 2011 MacBooks Pro.