720p video laggy on 1080p external monitor - Please help!

Hey guys,

I have a Macbook connected to a 23.5 inch external LED monitor with a native resolution of 1080p. When I watch youtube/flash videos in 720p, the lag is unbearable. But if I watch a 1080p video it looks great. I've looked around and I can't seem to find a solution to this problem.

Thanks in advance.

Note: When a youtube video is uploaded in 1080p, I can view it in 720 with no lag. I've also messed around with my display settings and there seems to be no lag if I lower the resolution of my external monitor, but I'd like to keep it in 1080p if possible.

Cliffs: - 720p flash video lags on 1080p monitor WAT DO?

DOnt really know much about macs, but maybe you need to update your video card driver, whatever it is...

Do you have hardware acceleration turned on? it might help

Do you have hardware acceleration turned on? it might help

edinsftw