Dual GPU (not crossfire or nvlink) the new kid on the block

Hardware Hub
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Hi all!

So, for a long time “IOMMU” groups were the it thing to pay attention when choosing motherboards. Even if you weren’t doing the entire VFIO / GPU passthrough fiasco (AFAIK it’s detected now and you get banned - alternatively, as a rumor, you might compile and DIY your own solution if you have C wizard magic of your own). Now it looks like the new king on the block is simply to have a mobo with two 16x lanes (or at least, one with a m.2 gen 4). Aside from that, you will likely need to pay attention to your power supply to ensure you have enough to power 2 GPU’s (or buy an additional one).

There are a ton of videos but I think this one sums it up pretty well (https://www.youtube.com/watch?v=QMWmEb2qS5I).

Now… I wonder… and this is the reason for the post… can you (wizards) use dual GPU and GPU passthrough ? As in DUAL GPU PASSTHROUGH? :open_mouth:

I’m guessing you will need a third GPU or use your CPU’s APU? Idk! I’m excited! Can you do it with an AMD+NVIDIA? what if you use the same brands? What’s the data?

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You can passthrough any PCIe device (function) you want. And as much as you want. Just be careful with stuff the host relies on. Like chipset or the SATA controller where the host OS drive is connected to. Or the USB port with your mouse+keyboard…stuff like that.

There are only PCIe devices. PCIe doesn’t care what stuff is connected. If lspci has a number associated with it, that’s all you need to know.