"Now I gotta figure out why I'm not running in gigabit mode."
So your nic shows 100mbit?
Yes, it shows 100mbit there.
the cable quality may in some cases cause the equipment to only allow syncing at 100 though.
I know I need to redo the cable between the first and second floor in my house since to much pulling and bending of it at to high angle caused it to only allow syncing at 100.
I think I might be having the exact same issue. When I was searching for the drivers for my NIC, I also found that they have an "ethernet cable quality tester" program designed for my NIC. So I unplugged the router's power (because it doesn't work when there's a link established, but I left the ethernet cable plugged into the router, because otherwise the testing program showed "open/broken cable" for all 4 tests) and ran the test:
Now this is a 75 foot cable, so it should be 22.86 metres. Could someone well versed in ethernet and Cat5e and networking explain to me what these testing results mean? From what I understand, 100mbit only uses 4 wires, so that's why I can still be using 100mbit connection while wires 4-5 are broken 16 metres away from my computer. Also, I know that impedance means resistance, but what does "impedance mismatch" mean for me and my network?