Memory clocks dropping and screen flicker when playing GPU accelerated video.

[criccio]

MSI Radeon HD5850 TwinFrozr II @ STOCK clocks and AMD Overdrive disabled. Catalyst 10.10/11/12

I recently went Eyefinity, and since then, whenever I start a movie, be it Flash or an h264 video in MPC-HC that my GPU will accelerate, my screen flickers and my GPU Memory clocks drop from 1000MHz to 900MHz.

Why the drop in clock speed? This didn't happen with a single screen.

 

[criccio]

Anyone?

Memory downclocking by 100MHz is normal when playing a video with 3 screens attached?

 

[qbanb8582]

if its flash then you need disable hardware acceleration. Whenever you have multiple displays on the screen flickers when the memory clock changes.

 

[criccio]

if its flash then you need disable hardware acceleration. Whenever you have multiple displays on the screen flickers when the memory clock changes.

So its just a "because thats the way it is" kinda thing? Why does the memory clock down? I'm just curious.

 

[qbanb8582]

the memory clock changes on single screens as well it just doesn't flicker when its a single display.

 

[qbanb8582]

i have 5870 and it does the same thing. So i have to disable hardware acceleration. I think its very annoying. I don't know if the 6000 series cards do it.