Thanks for the link!
Looking at this sheet:
https://www.checkpoint.com/downloads/products/5800-security-gateway-datasheet.pdf
It looks like the 5800 had such a card with the HPP addon?
"Inclusive High Performance Package
Purchase the affordable High
Performance Package (HPP) and get a
base system plus one 2x 10Gb SFP+
interface card, transceivers, redundant
AC or DC power supplies and 16 GB of
memory for high connection capacity."
PDF has a picture of a 10G dual ethernet.
The 5600 pdf also has that photo, but the text says 4 x 1G
https://www.checkpoint.com/downloads/products/5600-security-gateway-datasheet.pdf
There's no standalone part for that either?
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Maybe broader question is there actually a 10G ethernet card for any model?
I see photos and mentions of such a thing existing different places, but no part.