Does anyone know, how can I check if I am using my two video cards?

It seem Blender is using only one of them. I have checked both on the user preferences settings. But reading temperatures in GPU-Z it seems Blender is using only one of them.

The first card card is Titan X maxwel and the other is GtX1080 TI pascal.

Please give guidance, I bought this new 1080Ti to speed up the render but is not helping much.

  • $\begingroup$ Please show an image of the System Preferences>System that show what you have for compute device. $\endgroup$
    – user1853
    Commented Jul 13, 2017 at 22:54

1 Answer 1


The easiest way to tell if it's using both cards is if you see two tiles being processed simultaneously when rendering. I have three cards processing this scene and you can clearly see the little orange corners on each of the tiles:

enter image description here

Also, I'm sure you already know this, but in addition to checking the User Preferences, make sure you have GPU rendering enabled in the Properties Pane:

enter image description here

  • $\begingroup$ Thanks,,,, i think it was a bug or something weird... I turn it off and then on and it works.. $\endgroup$
    – Felipe
    Commented Jul 15, 2017 at 22:37
  • $\begingroup$ @Felipe - Hey no problem at all... if this answers your question please accept it so that it moves out of the queue, thanks. $\endgroup$
    – bertmoog
    Commented Jul 16, 2017 at 0:56

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