Windows 10: <100 Mbps on Gig network

I just upgraded to a new Windows 11 PC. Reused the same ethernet cable, but only got about 50 Mbps, where my Win10 got about 800. My PC is plugged into a dumb gig switch. The switch is plugged into one of the 4 ports on my Google Fiber router. I also have a Synology NAS with two NICS. The primary NIC is plugged into a second port on the Google Router. The secondary NIC for redundancy, not aggregating is plugged into the same switch as my PC. This has worked for years on my Win10 PC, but appears to create a loop with my Win11 PC. When I unplug the second NIC, my speed goes from 50 Mbps to 850

:)

 

Ethernet speed capped at 100 Mbps

I have a Lenovo Legion T5 28IMB05, and my Ethernet connection is capped at 100 Mbps.

Things I have already tried and didn't work:

• Switch to another cable. Originally, I had a CAT5e and as my speed was capped, I bought a CAT6. It didn't help (though I'm still using it)
  
• Force the driver to use 1000 Mbps full duplex
  
• Try my cable and router with another PC. It works
  
• Try to boot from a live USB running Ubuntu 21.10. It also didn't reach full speed
  

The funny thing is that if a plug a USB Ethernet adapter (TP-link UE330), it reaches gigabit speeds with that cable and router; and then if I reconnect the cable to the Ethernet port on my PC, IT WORKS at gigabit speeds for as long as I have the PC turned on. When I restart, it goes back to 100 Mbps.

As of course, I prefer not to have to depend on a USB dongle to reach full speed on my network, what can I do?

 

cannot exceed 100 mbps

6/22/2020

I subscribe to Spectrum for their ultra fast internet. Their tech came to my house and said that he measured a speed of 400 plus mbps at the modem. He said the refurbished router (that Spectrum also provided) may not be performing
to max and that I should purchase a new router (just to be sure). I did. It did not however change my receiving/sending speeds when using Spectrum's suggested speed test site. I then called Spectrum back and they said my PCI adapter, even though connected
from the router via an ethernet cable to my desktop's PCI card's adapter directly, still was limited to 100/100 mbps. (Also, my laptop tested at the same exact speed of 94 mbps via wi-fi!) They said the slow internet speeds were due to my computers not
being able to receive or send the faster internet speeds. So, I asked my friend who suggested that I ask Microsoft if there is a way to increase the speed, apparently limited by my Realtek PCIe GBE Family Controller (on my Desktop). My tech friend said that
the PCI card mentioned could handle up to 1GB speeds. So, how do I increase the PCI network adapter's speed to accept the 400 mbps speeds. Or is that even verifiable, since my laptops network adapter's speed was limited to 144 mbps and also only received/sent
94 mbps?

My internet speeds seem to be adequate for my computer use. It's just that I cannot verify that I am getting any of the speeds they say they guarantee. I was hoping that an increase in internet speed would help my television's (ethernet cabled) receiving
speeds.

So, in sum: 1) Can I change the limits on either of my computers' network adapters? and,

2) How can I measure and verify that Spectrum is really sending me the faster internet speeds they guarantee?

Steve

 

Curious about the difference beteen G5 mbps and the 2.4 mbps network

On one PC I get on the G5, 75 mbps download and 8.6 mbps on the upload and ping 114 ms (speed test)
On the other PC with 2.4 mbps I get on average 16.8 download and 4.6 upload and ping 21 ms (speed test)
Yet the speed between the 2 PC's does not seem to be that much different when browsing.
Furthermore, I tried to get the second PC also on the G5 but for some reason the G5 does not come up on the network list.
I was told that being on the G5 you get less interference using Wi-Fi.
Both PC's have the windows 10 OS.
I did reset the modem and I reset the network, but it did not make the G5 come up on the network list of the second PC, whereas before I changed mine to the G5 from the 2.4 you could see that both were visible on the both PC's network list.