21.3" Samsung LCD Monitor with my 15" Macbook PRo

Hi.. I have a 15" Macbook pro and I recently hooked iit up to a 1600 x 1200 resolution samsung monitor. I would like to use mirror display but it looks terrible because they both use the same resolutions. Is it possible to use the mirror display mode while having the proper resolutions for each monitor? Also.. is it possible for the secondary screen to not go blank when playing full screen games? thanks

Mirroring means exactly the same thing will be on each screen. They both must run at the same format to mirror one another.
If you turn mirroring off, then the two screens can be set independently to their optimum resolution.
As far as your second question goes, I'm not sure. Are you saying that even when in mirror mode the second screen goes blank? In that case, I guess that means the game is taking control of the settings and turning mirroring off to free up maximum amounts of VRAM for the game. It's probably best that is happening because the game would no doubt experience a graphics slow down with less video memory at its disposal.

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