Maximum download and upload speed of the cm1200 cable modem?

I am using a cat 6a thin cable from the cable modem to the router.  Then from the router to the switch cat 6a thin cable.  Then from the switch to the computer is a cat 6a thin cable.

My cable modem is connected to an Asus zenwifi ax mini (xd4) mesh wifi system with 3 nodes throughout my house.

When I go from cable modem to my computer using a cat 6a thin cable and run a speed test I get 950mbps down and 23mbps upload.  This is the same speed I get when I go through my router and switch.

I have tried to speed test with a 2018 macbook pro and a dell precision 5760 laptop. Both give the same speeds.

The speed test app that I was using was speedtest.net and speedtest.xfinity.com