Realtek GBe limiting issue

[Automaddic]

Hey there. I use an HP Omen 17 Gaming laptop, and recently my internet card has been limited to a link speed of 100mbps when the card is a Realtek GBe Family controller card. I have tried all of the common and slightly uncommon software fixes, and I was wondering if anyone has something new I could try, or how I can replace the card entirely.

List of things I have already tried:

Speed & Duplex: Set to “Auto-Negotiation”.

Flow Control: Enable (if available).

Jumbo Frame: Try to enable this option if it is available (this usually improves performance).

Update BIOS

Check network cables and ports -- all are functioning, (I have directly connected to the same wire, different cat 5 wires, and directly to the modem with different devices)

Check the router settings -- other devices get 1000mbps

Try Different Driver Versions -- i have updated and downdated my drivers.

The flush commands:

netsh int ip reset

netsh winsock reset

ipconfig /flushdns

ipconfig /release

ipconfig /renew

Check the power management settings

• Checked for malware -- 2 different scanner applications (deep scanned)

• configured the card for specific params:

  • Auto Disable GB is off

  • Energy-efficient Ethernet is off

  • Gigabit Lite is off

  • Green ethernet is off

  • Power power-saving mode is off

  • speed and duplex (I will explain later on)

• checked for updates

USB ethernet also is limited to 100mbps through link speed

So with my speed and duplex settings, I can set them, but then it does something odd. I have set the speed and duplex settings to auto-negotiate but nothing happens. I have manually set it to 1GBps and the weird thing is that when I press accept, I look at the link speed value in the settings application, and it changes to 1000 for 5 seconds, where it then promptly returns to 100 Mbps after. 

That is everything I have tried. I have contacted Microsoft with the same question and got directed here. 

[Automaddic]

If anyone has any tips on how to change the card entirely, please post them as well. The only thing i have left to do is a fresh reinstall of the OS and my data.