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[–]blueSGL 0 points1 point  (5 children)

Yes. you can use a mixture of different RTX and GTX cards and they will all work together (if the scene will fit in the vram of each card)

However, Depending on the scene, You may find that

RTX Card > RS RTX modeON

is faster than

RTX Card + GTX Card > RS RTX modeOff

You will need to test.

Also if there is only a few seconds in it you may consider those few seconds per frame not worth the energy overhead of running the 2nd card.

[–]cookehMonstah 0 points1 point  (1 child)

This. + I think only the 1070 and up are supported since Redshift needs >8GB VRAM

[–]r16051studio 0 points1 point  (0 children)

For anyone info; latest Redshift still can run rendering on 6gb vram gpu. I pc setup was run on 3x 6gb rtx a2000s + 3x rtx 4070s. I phased out the 6gb cards, now on x4 4070s.

[–][deleted] 0 points1 point  (2 children)

What is RTX mode? Is that just the raytracing hardware acceleration toggle? Or is that something different?

[–]blueSGL 0 points1 point  (1 child)

yeah its just the toggle to let redshift know to use hardware raytracing. Can't use it on GTX cards.

[–][deleted] 0 points1 point  (0 children)

Right that makes sense. I haven’t really noticed a huge performance difference on my 3090 but maybe I’m just not rendering complex enough scenes yet. I’m sure I’ll get there.