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Windows Laptop Boots Up with 100 Mbps Ethernet, but Switches to 1 Gbps After Disabling and Reenabling Network Adapter

Just got a brand new Asus TUF Dash F15 (TUF516PE-AB73) gaming laptop. But when it boots up Windows 11, I noticed that the wired ethernet connects at 100 Mbps (see screen shot below).

If I disable and enable the adapter in Control Panel -> Network and Internet -> Network Connections, it will, often times, switch itself to 1 Gbps. Disconnecting and reconnecting the ethernet cable itself from the switch will also do the same.

The device driver reports that it is a "Realtek Gaming GbE Family Controller". I did test the transfer speed by moving a large file (1 GB or larger) over LAN. And it is about 5x faster when connected at 1 Gbps over 100 Mbps.

Why is the computing booting up at 100 Mbps? Why doesn't the computer boot with 1 Gbps connetion?

Attached Image:

100 Mbps.png

Sun, 27 Feb 2022 16:30:45 -0800

I just did the disabling/enabling and as you can see in the screen shot below that it is now connected at 1 Gbps.

Attached Image:

1 Gbps.png

Sun, 27 Feb 2022 16:33:12 -0800

I have configured the Ethernet device driver as follows, but the problem persists after reboot:

- Advanced EEE: Disabled
- Energy-Efficient Ethernet: Disabled
- Gigabit Lite: Disabled
- Green Ethernet: Disabled
- Power Saving Mode: Disabled
- Speed & Duplex: 1.0 Gbps Full Duplex

Mon, 28 Feb 2022 16:59:54 -0800

Ok. I decided to try changing one more setting: "WOL & Shutdown Link Speed". This setting is for wake-on-LAN, which is a feature I'm not using and have never used in my life. But this configuration allows you to choose one of three options:

  1. 10 Mbps First
  2. 100 Mbps First
  3. Not Speed Down

It defaults to "10 Mbps First". I believe the setting for this configuration changes the network adapter speed when the computer sleeps, hibernates, and shutdowns. So I theorized that maybe it's this setting that causes the Ethernet connection to default to 100 Mbps on boot.

I set it to "Not Speed Down". So far, after two reboots, the laptop has started with 1 Gbps both times. I'll keep my fingers crossed.

Tue, 01 Mar 2022 00:38:04 -0800

Nope. That didn't solve the problem. Laptop booted up in 100 Mbps mode again. Looks like there is no way to get this network card to consistently start up in 1 Gbps mode. I will probably have to implement some time of automation to switch it every time the computer starts.

Tue, 01 Mar 2022 16:01:47 -0800

Maybe the "Not Speed Down" setting is working. Because out of 5 reboots, only 1 reboot started in 100 Mbps mode. The other four (including the last two) reboots always started in 1 Gbps mode.

Comparing this statistics to when I first start on this journey, over 9 out of 10 reboots caused the network adapter/card to start in 100 Mbps mode.

I'll keep monitoring.

Wed, 02 Mar 2022 16:33:19 -0800

Nope. Looks like that wasn't it either. For a while the laptop boots up 1 Gbps most of the time. But now, it has reverted to booting up 100 Mbps most of the time.

Fri, 11 Mar 2022 11:09:06 -0800

Ok. I have determined all the following has to be set for the network adapter to have a chance of coming up in 1 Gbps mode.

- Advanced EEE: Disabled
- Energy-Efficient Ethernet: Disabled
- Gigabit Lite: Disabled
- Green Ethernet: Disabled
- Power Saving Mode: Disabled
- Speed & Duplex: 1.0 Gbps Full Duplex
- WOL & Shutdown Link Speed: Not Speed Down

I enabled everything other than "WOL & Shutdown Link Speed" and found that I can never get the network adapter to enable in 1 Gbps mode. So it definitely have something to do with the driver and these driver settings.

Sun, 13 Mar 2022 19:15:47 -0700

Mine is just stuck on 100 wifi is fine tho tried differnt driver and cables no go

Michael Doolan
Tue, 30 Aug 2022 14:52:09 -0700

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