Getting slow download speed using ethernet from TP-Link Archer C6
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Hello,
I recently bought a new TP-Link Archer C6 AC1200 Wireless MU-MIMO Gigabit Router for my new 100 Mbps connection. I'm getting great speed over wifi @ 5GHz mode. But when my PC is connected to the router using ethernet. For some wierd reason my download speed is very slow but my upload speed is alright.
I wanted to make sure that my ISP has no issues. So I even tested the speed results from my old TL-WR841N V11 router. Using my old router I got a good speed for both download and upload speeds.
Now all the test were done while wifi was turned off and all tests were done on same server. Also one wirless test done on 5Ghz network.
Here are the speed check results.
TP-Link Archer C6
Ethernet
Download: 45 Mbps (Average) BAD
Upload: 95 Mbps (Average)
Wireless 5Ghz
Download: 95 Mbps (Average)
Upload:97 Mbps (Average)
TL-WR841N
Download: 87 Mbps (Average)
Upload: 95 Mbps (Average)
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@Kevin_Z Could you please explain same steps but for old interface? I have Archer C5 V1 (green UI).
Firmware version:0.9.1 3.0 v0045.0 Build 160411 Rel.42416n
Hardware version:Archer C50 v1 00000002
I also have same mysterious problem. Mac plugged directly in to ethernet socket gives 1000Mps (using either of 2 cables). Then use same 2 cables for Mac to router, then router to wall socket = 100Mps. How can I enable max speed for ethernet and wifi please?
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Thanks for bringing this up. Can you please confirm the above info that we want to confirm, then we will try to figure it out?
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Hello, please refer to my previous suggestions and see if one of them will help the situation, thanks.
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Just to confirm, what is the exact model number of your TP-Link device, is it Archer C5 or C50? How about its version, V4 or V2 or something else?
You may refer to the article to confirm if you have that option on your device, if you cannot find it, that means this option is not available on your device, then you are suggested to try other suggestions in my previous reply. Thanks.
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@Kevin_Z so sorry, it is AC1200 Archer C50 V1 as in the pasted text:
Firmware version:0.9.1 3.0 v0045.0 Build 160411 Rel.42416n
Hardware version:Archer C50 v1 00000002
Where can I get support for this problem on this model please? It is not a cable or PC issue.
It has the older UI, green not blue:
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Thank you very much for the details. There is no Speed negotiation settings on the green UI, can you please confirm where did you see this capped 100Mbps when connected to the C50? Do you refer to the speedtest? You may try to reset it to factory defaults and reconfigure it from scratch, then confirm again if the speed can be normal.
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wanted to share my experience, maybe it will help somebody.
Bought today Archer AX50 mainly because I wanted to have stronger Wired LAN connection. I got new internet where speed increased to 1Gbit. Previous router was able to support max 100MBit and that was the main reason why I bought stronger router with 1Gbit LAN connectors.
When I connected router I was getting 200-300Mbit on a wired LAN. Wireless was just okay, on an iphone 11 around 650Mbit was constantly available so the problem was wired connection. When I connect computer directly to modem, I am getting 800-900Mbit so obviously to me problem was router.
I have tried exchanging cables like few people mentioned, but makes no sense that same cable is getting thru one device 200-300Mbit and on another 800-900Mbit. So it wasn't the cable that was the problem.
I have upgraded the firmware also on the router, didn't help much.
I was frustrated and decided to exchange it for something else, because obviously the problem was only wired LAN.
As the last resort I have tried updating the drivers of the wireless card. BINGO. When actually downgraded to a driver from 2016 (Realtek 1gbit ethernet connection), I was getting constantly 800-900Mbit.
It makes no sense to me why the ethernet card, even downgraded driver was the problem, when the same card was working without the Archer. So playing with the drivers of the ethernet card helped me (restoring to the driver actually from 2016). Saw that with this router even older driver is better. My results:
driver
28.8.2018 latency 11ms UP 840Mbit DOWN 96MBit
14.7.2016 latency 5ms UP 868Mbit DOWN 98MBit constantly this driver was giving me best numbers
23.3.2017 latency 9ms UP 771bit DOWN 92MBit
15.6.2018 latency 9ms UP 846Mbit DOWN 97MBit
1.10.2021 latency 12ms UP 876Mbit DOWN 98MBit
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