Have a look at the CCR2004-1G-2XS-PCIe from MikroTik. It’s a router on a PCIe card, with its own OS.
What’s your usecase? Might be able to get better recommendations if you can tell us what you’re trying to do.
What’s your usecase? Might be able to get better recommendations if you can tell us what you’re trying to do.
Ideally the card would have a TPM module and supports some sort of signed boot/firmware validation.
I know I'm being a bit coy, but hopefully that helps you understand the requirements a bit better?