Laptop, External Monitor Only, performance

[Torphage]

What I've read so far you can, with a laptop, turn off the laptop's monitor and only use an external one. Would this, just having a larger screen size, cause any decrease in performance if both monitors are 1080x1920?

And would I be able to use a wired keyboard + mouse on the external monitor without activating my laptop's screen again?


I was basically planning to buy an external keyboard + monitor for my laptop. The current keyboard gets really hot (designed to be) and the monitor is too small for my taste.

 

[jaguarskx]

You will not really notice any difference since the same video signal is sent to both the laptop's screen and the external monitor.

 

[boosted1g]

No there will be no difference what=so=ever. The GPU is still processing the same data regardless if it ouputs to the screen, external video out or both.