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Multiple GPUs performance scaling

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Message 1 of 2
peterDTE7K
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Multiple GPUs performance scaling

Hello, how does Arnold scale with multiple GPUs in terms of performance? I already found out that mixing different GPUs is not a good idea. For instance I have system with RTX 4090 and 3080 TI. Here are render times for some sample scene:

Using 4090 - time 2min 37s

Using 3080 TI - time 5min 35s

Using 4090+3080 TI - time 3:04

So if I use both it is actually slower than using just the more powerful one. How does it scale if you use 2 GPUs of the same type?

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Message 2 of 2

Wont get that much faster. 

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