It is highly unlikely you would ever saturate the throughput capabilities of the modem before hitting the cap on your Internet connection. Your ISP sets a software "cap" on your Internet speed on their end of things, which limits your speed, based on your connection plan. Unless you have a different connection plan itself for each modem, having two modems is sort of ludicrous.
Comcast High-Speed Internet only supports speeds up to 12Mbps. Unless your modem and network connection are like a decade old, it's safe to say your network supports speeds of 100Mbps. In this case, you will hit the ISP's speed cap of 12Mbps (mind you it says up to 12Mbps, which means much of the time you will not even get that far due to shared broadband) long before you hit your home network's cap.
EDIT: Please don't double-post in multiple boards with the same issue. Please just stick with one post per issue. We don't want to increase the workload unnecessarily. I've deleted your duplicate post in the other board.
Comcast High-Speed Internet only supports speeds up to 12Mbps. Unless your modem and network connection are like a decade old, it's safe to say your network supports speeds of 100Mbps. In this case, you will hit the ISP's speed cap of 12Mbps (mind you it says up to 12Mbps, which means much of the time you will not even get that far due to shared broadband) long before you hit your home network's cap.
EDIT: Please don't double-post in multiple boards with the same issue. Please just stick with one post per issue. We don't want to increase the workload unnecessarily. I've deleted your duplicate post in the other board.
