If you only have a few devices, you’re overpaying if your main PC link speed is significantly below your ISPs claimed speed.

Here’s how I get link speeds on Windows:

wmic nic where netEnabled=true get name, speed

powershell "Get-NetAdapter | select interfaceDescription, name, status, linkSpeed"

If you run a CAT5E/CAT6 ethernet cable from your PC to your router, you should see a link speed of 1000000000 (same as 1000Mbps or 1Gbps).