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280x multi-monitor window lag when video playing

Joined
Sep 21, 2011
Messages
32 (0.01/day)
Location
Glasgow, Scotland
Processor Intel Core i5 2500k 4.5ghz
Motherboard Asus P8Z68-V Pro
Cooling Antec Kühler H2O 620
Memory Corsair Vengeance 8gb 1866mhz
Video Card(s) Asus R9 280x DirectCUII
Storage Samsung 1TB F3 HD103SJ
Display(s) Asus VS228H + AOC 2369
Case Fractal Design Arc Midi R2
Audio Device(s) Creative Sound Blaster Z
Power Supply Antec Truepower 650w
Software Windows 7 SP1 64bit
I recently got a second monitor for use with my R9 280x graphics card. It's an AOC LED monitor but that is probably irelevant to the issue I am having.



I have noticed now, that when I am running a video, either in VLC, Youtube or WMP or a game that I might have displayed on one monitor, if I have a web browser or windows explorer open, when I drag the window I notice quite a big of lag, almost asif it is running at 20fps. This issue happens with all windows animations, but is quickly fixed if I close any videos playing.



One of the monitors is plugged in via HDMI, the other by DVI. I read on the internet there was a similar issue on Nvidia cards that was solved by changing the power settings to "multi-display acceleration". However I could not a similar setting in Catalyst.



Is this a driver bug? Is there a fix?



Thanks
 
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