There is this amazing document available for the 100G Intrusion Detection, where the specs of 10Gbps per system are mentioned with a lot of good information to consider while spec-ing out the hardware and designing an efficient monitoring solution.
Here’s the link to the whitepaper: https://www.cspi.com/wp-content/uploads/2016/09/Berkeley-100GIntrusionDetection.pdf
Hope this helps.
Fatema