F5F Stay Refreshed Power Users Networks Internet download speed is stuck at 100 Mbps when I get a brand new computer.

Internet download speed is stuck at 100 Mbps when I get a brand new computer.

Internet download speed is stuck at 100 Mbps when I get a brand new computer.

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Prince_Laura
Junior Member
14
06-02-2026, 05:47 PM
#1
I found every driver I could think of on a new PC, updated Windows, and Ethernet Status shows speed at 100 Mbps. Using the exact same cable and location as my old build that got over 800Mbps with Windows 10 Asus TUF Gaming B650-PLUS
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Prince_Laura
06-02-2026, 05:47 PM #1

I found every driver I could think of on a new PC, updated Windows, and Ethernet Status shows speed at 100 Mbps. Using the exact same cable and location as my old build that got over 800Mbps with Windows 10 Asus TUF Gaming B650-PLUS

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markusmp
Junior Member
41
06-03-2026, 10:39 PM
#2
A 2.5 Gb speed might get too many signals if the wire is weak, but you need to check if it's a wall socket one or a straight line run to your router.
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markusmp
06-03-2026, 10:39 PM #2

A 2.5 Gb speed might get too many signals if the wire is weak, but you need to check if it's a wall socket one or a straight line run to your router.

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lelemi98
Junior Member
6
06-04-2026, 05:54 AM
#3
I finally got it working, needed to set the speed manually at 1.0 Gbps right under Realtek in Device Manager's Speed & Duplex section because others probably hit the same trouble.
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lelemi98
06-04-2026, 05:54 AM #3

I finally got it working, needed to set the speed manually at 1.0 Gbps right under Realtek in Device Manager's Speed & Duplex section because others probably hit the same trouble.

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DonCruzader
Member
71
06-05-2026, 08:11 PM
#4
That won't work forever. Eventually, the other end might drop to 100Mbit and then you have no connection at all. You need to fix the cable and leave the adapter set to auto mode. I did not answer your question about what your actual physical connectivity is... You should try temporarily running a new (even if long) factory-made cable directly from your router. That should be a Cat5e or Cat6a cable, made of 100% copper with wires that are 22-24 gauge. I personally like the monoprice cables -- here is their link: https://www.amazon.com/Monoprice-Flexboo...B00KWS7GAC
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DonCruzader
06-05-2026, 08:11 PM #4

That won't work forever. Eventually, the other end might drop to 100Mbit and then you have no connection at all. You need to fix the cable and leave the adapter set to auto mode. I did not answer your question about what your actual physical connectivity is... You should try temporarily running a new (even if long) factory-made cable directly from your router. That should be a Cat5e or Cat6a cable, made of 100% copper with wires that are 22-24 gauge. I personally like the monoprice cables -- here is their link: https://www.amazon.com/Monoprice-Flexboo...B00KWS7GAC

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JustYumYums
Junior Member
13
06-12-2026, 10:05 PM
#5
The wire plugs straight into my router and it's Cat 5e grade. I'm buying a new Cat 6 one from Monoprice to upgrade the connection.
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JustYumYums
06-12-2026, 10:05 PM #5

The wire plugs straight into my router and it's Cat 5e grade. I'm buying a new Cat 6 one from Monoprice to upgrade the connection.