AnsweredAssumed Answered

2700x - Multiple GPU?

Question asked by shujx4 on Aug 16, 2018
Latest reply on Aug 17, 2018 by misterj

I've read that CPUs have PCIe lanes and that those are used by the GPU.

 

1.- So if Ryzen 2700x has 20 PCIe lanes, does that mean I can only have one x16 GPU (or 2 x8)?

 

2.-  Does that mean if I want two x16 I need a 40 PCIe lanes processor?

 

3.- If that's the case, why does having multiple graphics cards on a 20 PCIe lane CPU actually makes a difference while GPU rendering?

 

(About the third question, here's a post showcasing it)

 

Best Hardware for GPU Rendering Octane Redshift Vray - CG Director

 

4.- If it doesn't affect negatively having multiple graphics cards on a 20 PCIe lane CPU (such as Ryzen 2700x) while doing GPU rendering, then, when does it matter? (negatively)

 

Thank you

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