Multi gpu for blender

[idieorudie]

Is it viable

Does it give perfect scaling?

[Kermit]

GTX 580 3gb

 

http://www.blenderguru.com/

[QueenDemetria]

Is it viable

Does it give perfect scaling?

Its been a while since I have used Blender, but I don't think it supports SLI or CFX since neither of those technologies cater for a professional environment. If Blender supports GPU assisted rendering, I would imagine that it could take advantage multi GPU set ups, but it would all depend on the renderer you use.

[idieorudie]

GTX 580 3gb

http://www.blenderguru.com/

That helped a lot

Multi gpu doesn't seem to give even a 80% boost just 60% is not enough

[idieorudie]

Its been a while since I have used Blender, but I don't think it supports SLI or CFX since neither of those technologies cater for a professional environment. If Blender supports GPU assisted rendering, I would imagine that it could take advantage multi GPU set ups, but it would all depend on the renderer you use.

Cycles render

[AdamH96]

There is no such thing as SLI scaling in blender. If I wanted to I could use a GTX 660 and a GTX 970 (I have both just don't have the motherboard...) to render the same image, each rendering a block. Using multi GPUs should in fact multiply by each (same model) GPU, if your CPU can feed all at the same rate. I'd suggest reading this article to set-up cycles to render properly on your GPU:

 

http://www.blenderguru.com/articles/4-easy-ways-to-speed-up-cycles/

(mainly look at tile settings)

 

(3x 590 GTX running at the same time which in total is 6 GPUs)

 

The reason it would not scale properly is because in each tile there are different amounts of detail which means it takes longer in certain sections of an image than others. With multiple GPUs running at once each GPU would have a different load amount causing for each GPU to finish a tile at different rates.

Hopefully this wasn't confusing lol