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It's expected behaviour. If you disable hardware acceleration in your browser it may reduce the spikes as the CPU will used instead.
Thanks. Thought something is wrong with my system since on Catalyst drivers clocks were lower when HWA was utilized.
Stumbled upon something weird today while watching a 1080p60fps Twitch video.
On 15.x drivers when I watch HWA video my GPU clocks sit at 300/1000 and GPU usage is around 20%.
On 16.x drivers clocks jump up and down every second and GPU usage is all over the place (50%++). But if I open a video in PotPlayer (or any other video player) with HWA enabled, then GPU usage and clocks go back to the 15.x driver level with twitch video still playing, mind you.
Here's a graph from MSI Afterburner showing this weird behaviour: http://i.imgur.com/CbU9Bpm.jpg
Red area is twitch video playing, yellow area is still twitch playing but also with PotPlayer playing a HWA video.
Just look at the GPU usage graphs with external player running at the same time as 1080p60fps video is playing in browser without any lag. What's going on here and is this REALLY a normal behavior of a GPU driver? CPU usage is the same and low in both cases.
I can't go back to 15.x drivers because with 15.7.1 or 15.11.1 most 1080p60fps on youtube and half 1080p60fps streams on twitch stutter and lag like crazy, pretty much unwatchable in Chrome and can't maintain 60fps in Firefox (gradually dropping from 60fps to 30 and buffering). What DLL files from 16.x drivers should I feed to the .exe file so that the application would use HWA from 16.x drivers while I go back to 15.11.1?