Make GPU stay at a certain clock

[DTDerian]

So recently I had to downgrade to Windows 7 because of some trouble that I'd been having recently. But, ever since the downgrade, when I'm watching Netflix/YouTube/Twitch or at idle, my GPU underclocks itself to 135 MHz. This is causing screen tearing and major lag at 1080p video, any clue how to fix it? Thanks.

 

[InvalidError]

Did you enable overclocking on your GPU?

On my HD5770, if I enable overclocking, I get major display issues because the GPU and VRAM down-clock so low at idle or when a video overlay is active that the GPU only has enough bandwidth left to refresh the primary display of my triple-display setup. For some reason, disabling overclocking does not cause clocks to go inanely low. The clocks still drop to baseline whenever a video overlay is active though, which ruins 3D performance if I happen to be running a game or other 3D app while playing a video from Youtube, MPC or other sources.

 

[DTDerian]

How do I disable overclocking? It overclocks itself when I'm playing.

 

[InvalidError]

If you left everything on default and it produces unwanted behavior, then you might want to see if there is a way to override those defaults to set your own minimum.