[vfio-users] GTX 580 Passthrough - Successes and Failures

[Ben J]

Yeah those are my findings as well, I'm passing through the card in the
second slot. I'll remove my SLI cable and reply after I've tested it.
On Feb 23, 2016 4:37 PM, "vfio" <vfio at taintedbit.com> wrote:

> Ah, interesting. I started by trying virtio 0.1.102 (stable), but this
> does not appear to support Windows 10 yet. When using virtio 0.1.112
> (latest), I experienced the freezing issues. After that, I simply stopped
> using virtio and this allowed Windows to install. I did not benchmark
> performance, but I assume it is poor. Windows update froze at 24% even
> without using virtio, but it may be the case that I was simply too
> impatient.
>
> Back when I had two 580 cards, it worked fine as long as the SLI cable was
> removed and I only passed through the card that was in the physically
> "lower" slot on the board. I was never able to successfully pass through
> the card in the slot physically closest to the CPU. In other words, a card
> in slot 1 will never work, and a card in slot 2 will only work as long as
> there is a graphics card in slot 1. Another way to look at it is that the
> card attached to the monitor showing the host UEFI screen will never work
> with passthrough.
>
> That being said, it is possible that I am wrong about this: it could be
> the case that updates in the past year have resolved the issue, or that my
> problems back then were also caused by the PCI lane DIP switches.
>
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