On 2024-05-20, Dale <rdalek1...@gmail.com> wrote:

A 3.0 card is supposed to work fine in a 2.0 slot.

> You, or anyone, have any idea why that card would kill my network? 
> I suspect the card itself is fine.  It did see the drive.  I just
> need the internet to work since it may be used in a NAS rig.

Is it causing the network interface to not show up at all in lspci?

Is it causing the network device name to change?

Or is the network interface still detected, still named the same, and
just doesn't send/receive packets?

It could be some sort of interrupt sharing problem. Even with PCI
express, cards still sometimes have to share interrupts.  Intel/IBM
made that bad decision 45 years ago, and we're still suffering because
of it.  If that the problem, sometimes you can avoid it by physically
rearranging the cards.

The later PCI hosts/boards finally came up with a way to avoid it, but
a lot of cards still don't support that.

--
Grant


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