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Slow LAN download speed on Windows 10

post #1 of 8
Thread Starter 
Okay, so I'm using this 9 year old laptop of the HP Pavilion DV6000 series (CPU is 11 years old biggrin.gif) which has a built in 100Mbps ethernet adapter showing up as "Realtek PCIe FE Family Controller" in device manager. However I don't think this problem has anything to do with this adapter because I replicated the same issue using a D-Link DUB-1312 (USB3 Gigabit Ethernet Adapter) via a USB2 port on that laptop, which connected at 100Mbps.

My LAN consists of two routers, an ASUS DSL-AC52U and an ASUS RT-N56U, both have gigabit ethernet. I'm actually reaching gigabit speeds between my desktops so the hardware and cables are up to it. The problem I'm going to describe occurs using my desktop's ethernet cable, I haven't tried any other.

So here's my problem: When transferring files from my laptop to a desktop on the LAN I'm getting around 11MB/s which sounds alright for a 100Mbps connection. However when downloading files to my laptop from a desktop on the LAN I'm getting between 3~6MB/s which is really bad. The laptop runs on a Samsung 840 EVO which is working well so that's ruled out.

I used TCP Optimizer (from SpeedGuide.net) and after applying the "Optimal" settings the issue seemed to be fixed. But after rebooting the laptop it was the same as before. I applied the same "Optimal" settings one more time and this time they fixed nothing.

I've used WIndows 7 and Windows 8.1 on this laptop before but I only found out about this issue recently, so I can't tell if it's Windows 10's fault. However the fact that the problem can be replicated with that USB ethernet adapter makes me believe it's software related.

Any suggestions?
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post #2 of 8
are you using a cat5 cable?
post #3 of 8
Thread Starter 
All of my cables are crossover Cat6.
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post #4 of 8
Quote:
So here's my problem: When transferring files from my laptop to a desktop on the LAN I'm getting around 11MB/s which sounds alright for a 100Mbps connection. However when downloading files to my laptop from a desktop on the LAN I'm getting between 3~6MB/s which is really bad. The laptop runs on a Samsung 840 EVO which is working well so that's ruled out.

Can you explain more specific at this point? Is it the laptop #1 and the desktop #2 and opposite or another one?

- laptop #1 -> desktop #2: ~ 11MB/s
- desktop #2 -> laptop #1: ~ 3-6MB/s
Quote:
When transferring files from my laptop to a desktop

Transferring how?Copy & paste through file explorer via the network?
Quote:
when downloading files to my laptop from a desktop

Downloading how? The same as above?
post #5 of 8
Thread Starter 
I'm transferring files through shared folders (all machines running Windows 10), so I guess we're talking about SAMBA? It's the same for both ways.

And yes you got the speeds right. If you replace laptop #1 with desktop #1 in both lines I get max HDD speeds in both directions, through the same cable.
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post #6 of 8
Quote:
Originally Posted by Daredevil 720 View Post

My LAN consists of two routers, an ASUS DSL-AC52U and an ASUS RT-N56U

So here's my problem: When transferring files from my laptop to a desktop on the LAN I'm getting around 11MB/s which sounds alright for a 100Mbps connection. However when downloading files to my laptop from a desktop on the LAN I'm getting between 3~6MB/s which is really bad.


Image taken from official ASUS product page:
https://www.asus.com/us/Networking/RTN56U/



tested speed can be as low as 50mb/s it seems in real world tests for that router. 50mb/s = 6.25MB/s. So no problem with the speeds you are getting when the laptop is involved. Lower speeds can be a result of radio bands being clogged by other nearby people's equipment, walls in the home, etc etc




Speeds should be better on the other router though, as long as the Laptop has a higher end 802.11 AC card with at least 2 antenna points on it and can connect on the 5GHz AC channels.
I dont see any information on what your laptop has at all, so I can only guess here but I would think with the speeds it has you probably dont have a newer 801.11AC wireless card put in it.
Edited by EniGma1987 - 4/18/17 at 2:28pm
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post #7 of 8
Quote:
Originally Posted by Daredevil 720 View Post

I'm transferring files through shared folders (all machines running Windows 10), so I guess we're talking about SAMBA? It's the same for both ways.

And yes you got the speeds right. If you replace laptop #1 with desktop #1 in both lines I get max HDD speeds in both directions, through the same cable.

The slow speed could be a result of low read/write HDD/SSD. Or could be result of the connectivity port smile.gif
post #8 of 8
Thread Starter 
As I mentioned in the OP, I'm not using wireless on my laptop. I tried both the integrated 100Mbps ethernet adapter and a D-Link DUB-1312 USB ethernet adapter, same problem on both. So not wireless, and not adapter related!

I also wrote in the OP that my laptop is running on an 840 EVO in full working state and that when I use my desktop on the same cable I connect my laptop to, I get full HDD speeds (60-80MB/s).
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