Start with these observations
- Record the adapter, cable and port used in each test.
- Add the observed link speed, not the advertised internet speed.
- Download your comparison notes for your own records.
Your connection record
Keep the PC, cable and port unchanged except for the part you are comparing. Entries stay in this tab.
| Test | Connection | Observed link speed |
|---|---|---|
| 1 | Original cable and port | |
| 2 | Known-good cable, same port | |
| 3 | Same cable, another port |
Official reference
Microsoft Learn: Get-NetAdapter
These starting checks use published documentation. They are not a diagnosis of your hardware.