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Sorry for the aside, but is it possible to create a GPU cluster for, say, machine learning or rendering that uses both NVDA and AMD GPUs, together? I have 4 AMD GPUs and 2 NVDA 1080 TIs and was curious if its possible to wire up a computer that uses all 6 simultaneously

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Sort of.

Mixed brand has a lot of bugs, and the different ways you'd hook up more than 4 cards have a lot of drawbacks so you would have to plan this carefully. It would be easier and more flexible to get a 4 slot board for the AMD GPUs and use the NVIDIA ones in a different machine.

EDIT: note also that the 4 slot board does not need to populate all the PCIE lanes necessarily depending on your workload.

Are there issues with using GPU drivers from several different GPU vendors on the same machine? I heard that from some people that were into the crypto-mining scene, and was curious if that carries over to all potential GPU cluster applications... Thanks for answering!

For ML maybe?

You can get the AMD builds of TF and PyTorch and then build a cluster out.

Realistically it'd likely to be more trouble than its worth. The AMD versions are always behind the core versions.

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