my xfinity gateway speed is 2285 Mbps, my computer's NIC is 2.5GBe. Why is my computer speed less than 1000Mbps?

Computer OS:

Edition Windows 10 Pro
Version 22H2

Processor Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz   3.50 GHz

Installed RAM 40.0 GB

System type 64-bit operating system, x64-based processor

Storage on C Drive: 815 GB free