F5F Stay Refreshed Power Users Networks Gigabit LAN speed limited to 100 Mbps

Gigabit LAN speed limited to 100 Mbps

Gigabit LAN speed limited to 100 Mbps

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iTzSantiiArg
Member
56
01-31-2026, 07:43 PM
#1
You've tried everything—firmware updates, a restart, and even swapping the router. The issue seems to be specific to your new Nighthawk X4S R7800. It might help to check for firmware compatibility or verify that the hardware is correctly installed. Also, ensure both computers are connected properly and that there are no driver conflicts. If the problem persists, consider reaching out to Nighthawk support for further assistance.
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iTzSantiiArg
01-31-2026, 07:43 PM #1

You've tried everything—firmware updates, a restart, and even swapping the router. The issue seems to be specific to your new Nighthawk X4S R7800. It might help to check for firmware compatibility or verify that the hardware is correctly installed. Also, ensure both computers are connected properly and that there are no driver conflicts. If the problem persists, consider reaching out to Nighthawk support for further assistance.

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GameBoosh
Senior Member
470
01-31-2026, 10:45 PM
#2
I'm not familiar with what controls the Nighthawk let you toy with but see if there's an option that lets you set the speed of the LAN interfaces. It may give you an option of 100/1000 and you'd want it set to 1000 or AUTO (if an option). At the same time though this is usually auto-negotiated unless you set it to do this so it's kind of a shot in the dark.
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GameBoosh
01-31-2026, 10:45 PM #2

I'm not familiar with what controls the Nighthawk let you toy with but see if there's an option that lets you set the speed of the LAN interfaces. It may give you an option of 100/1000 and you'd want it set to 1000 or AUTO (if an option). At the same time though this is usually auto-negotiated unless you set it to do this so it's kind of a shot in the dark.

M
mcDavoz
Senior Member
544
02-14-2026, 12:39 PM
#3
I was exploring the settings but didn’t locate an option to adjust the LAN speed. The only guidance I found online mentioned setting the adapter’s advanced properties to auto negotiate for speed and duplex.
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mcDavoz
02-14-2026, 12:39 PM #3

I was exploring the settings but didn’t locate an option to adjust the LAN speed. The only guidance I found online mentioned setting the adapter’s advanced properties to auto negotiate for speed and duplex.

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BunnyFucker
Member
172
02-20-2026, 01:49 AM
#4
It appears the problem might involve both machines, not just one. Enforcing full-duplex could potentially resolve the issue. Check if it’s limited to these two devices.
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BunnyFucker
02-20-2026, 01:49 AM #4

It appears the problem might involve both machines, not just one. Enforcing full-duplex could potentially resolve the issue. Check if it’s limited to these two devices.

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114
02-20-2026, 02:34 AM
#5
I only have a laptop available for testing, but it doesn’t come with a boot drive, which means it will take some time before I can run tests on it.
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chimmychonga12
02-20-2026, 02:34 AM #5

I only have a laptop available for testing, but it doesn’t come with a boot drive, which means it will take some time before I can run tests on it.

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Nakamasaki
Member
239
02-20-2026, 04:30 AM
#6
You might install Linux on a small USB stick and start from there. Then use "ip a" to see how fast the network is.
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Nakamasaki
02-20-2026, 04:30 AM #6

You might install Linux on a small USB stick and start from there. Then use "ip a" to see how fast the network is.

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FakerDude
Member
147
02-20-2026, 08:18 PM
#7
I set up Windows 10 on my laptop and connected it to the router using a patch cable, but it only provides 1GB of speed. I’m still puzzled about why this is happening.
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FakerDude
02-20-2026, 08:18 PM #7

I set up Windows 10 on my laptop and connected it to the router using a patch cable, but it only provides 1GB of speed. I’m still puzzled about why this is happening.

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coolguy0113
Junior Member
5
02-20-2026, 10:02 PM
#8
Verified every port on the router and confirmed the laptop displays 1Gbps across all connections.
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coolguy0113
02-20-2026, 10:02 PM #8

Verified every port on the router and confirmed the laptop displays 1Gbps across all connections.

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lilycotterill
Senior Member
656
02-21-2026, 11:53 AM
#9
good idea. i just checked and all the ports show as 1 gb when i hook the laptop up to them.
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lilycotterill
02-21-2026, 11:53 AM #9

good idea. i just checked and all the ports show as 1 gb when i hook the laptop up to them.

D
DonMcOne
Member
188
02-22-2026, 01:40 AM
#10
The router seems to be working properly, likely related to your clients. If you connect the Ethernet cables from those two computers to the laptop, will it maintain 100Mbit or drop to 1Gbit?
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DonMcOne
02-22-2026, 01:40 AM #10

The router seems to be working properly, likely related to your clients. If you connect the Ethernet cables from those two computers to the laptop, will it maintain 100Mbit or drop to 1Gbit?

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