How to stop GPU from rendering my external display when I turned off the external display.

nobodytrust2008

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Sep 8, 2017
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So. my build is as follow
AMD Ryzen5 1600
8GB RAM (2x4GB dual channel)
Galax GTX 1060 OC

So, I wanted my pc to be able to display 2 screens. But, I'm afraid, when I'm gaming, the external screen will weigh my GPU down. So, I wonder how I can stop my GPU to render the external display when I don't need the external display. thanks :)

Oh, and yeah another question, which display accessory is better? DVI-D? HDMI?
just fyi, I'm going to use:
Main Monitor with 1920x1080 res
and
External Monitor with 1064x768 monitor
 
Solution
you'll not notice the external, and if it is off then it should tell windows it's not there, although this might only work on digital connections.