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December 31st, 2022 05:00
Slow Ethernet - 80-100 mbps on 1gbps internet service
I am only receiving 80-100 mbps download speeds (60 mbps Upload) on my Dell Inspiron 3891, purchased approximately one year ago.... I have confirmed the speed coming out of the modem is 1gbps. I have a Google Nest wifi router connected to the modem.
My system says it has a Realtek PCIe GbE Family Controller. I am assuming that would allow me to obtain up to 1gbps ethernet speeds.
Can anyone ID why my ethernet speed is so slow? I have Cat 6 ethernet cables....
Thank you!
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redxps630
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December 31st, 2022 11:00
Try use a brand new cable rather than trying cables you have at hand. I assume there ought to be two cables at minimum in the connection. One from cable modem to router. The other from router to 3891. Both cables need to be replaced with brand new ones to see if there is improvement.
when you say you have confirmed 1gb speed straight out of modem, did you try connecting 3891 directly to modem without a router? You can test the cable that way too, although such a connection is not recommended due to security risk. If you try that do it very quickly then disconnect.
JOcean
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December 31st, 2022 09:00
Just curious, do you have Smartbyte installed and enabled? If so uninstall it and disable it in Task Manager.
Rickalo
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December 31st, 2022 10:00
I have tried two different ethernet cables, with no change... When working with Google to determine if it was their router, they also suggested I check the Auto Negotiation setting which was on "auto".
I was just wanted to make sure that the Realtek PCIe GbE Family Controller would indeed handle speeds up to 1gbps..
redxps630
9 Legend
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14.6K Posts
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December 31st, 2022 10:00
Try a brand new Cat 6 Ethernet cable.
It is most often due to ethernet cable, even if the cable you use now looks good on the outside. Try a brand new ethernet cable.
Ethernet Link Speed Capped at 100 Mbps
(1) The only setting that is of concern for a Gigabit connection is that the adapter is set to Auto Negotiation. From the Device Manager, you can check to see that the Intel adapter is set on Auto Negotiation. This option is under the Advanced tab of the adapter’s properties, in Speed & Duplex – right-click the adapter and choose properties, click the Advanced tab, and click Speed & Duplex, and make sure it is set to Auto Negotiation. This is the default setting.
(2) If this is set correctly and your link speed still reads as 100 Mbps, then the issue is almost always an issue with an Ethernet cable, though it could be a few things.
Before troubleshooting any further, check the connection of the Ethernet cable into networking equipment, as well as your computer. Make sure each cable is labeled Cat 6 or Cat 7. Unplug each Ethernet cable and plug it back in. Make sure that your cable is pressed firmly into the Ethernet jack. You should hear and feel a very audible click sound when the cable is in place. If you do not feel and hear this, then this cable should be considered broken, and you need to replace it.
Even if you believe that your Ethernet cabling is perfectly fine, and even if this cabling worked fine before, swapping it out for another, proven cable, or a brand new Cat 6 cable, will almost certainly solve the issue with the minimum of troubleshooting and headache. This is a very, very common occurrence when troubleshooting Gigabit Ethernet, and it nearly always comes down to one cable being the culprit.
Rickalo
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January 6th, 2023 03:00
I removed the cable from the modem to the router, and found a spot where the cable sheath was damaged and the wires exposed. I replace the cable, and the speed went from 70mbps to 890mbps.
Thank you for reinforcing the eed for replacing the cables!