Slow Wired/Ethernet Internet but Fast Wireless

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shoephone1

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Feb 5, 2017
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Hello!

I pay for 100 mbps internet from Cox and my computer is a MSI GT73VR 7RF Titan Pro running Windows 10. My wireless internet router -- a Netgear R6300v2 running Firmware Version V1.0.4.28 10.0.89 -- has different ethernet and wireless upload and download speeds.

Typical speeds:
Ethernet download: 80-95 mbps
Ethernet upload: unstable 0-2 mbps, drops with time during the speed test

Wireless download: 75-85 mbps
Wireless upload: 10-15 mbps

These numbers are consistent, as I have tested them multiple times. These numbers are consistent between multiple ethernet and patch cables, so I don't think that there's anything wrong with the ethernet cables.

What should I do to increase the ethernet upload speeds?

Thank everybody so much for any help!
 
Solution
B
Killer chipsets are known from all kinds of strangeness on their nics. They have a history of bugs, they fix one and break something else. The killer suite can not be completely uninstalled. The only way to do that is to go to their site and down load the drivers without the killer features.

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anotherdrew

anotherdrew

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Dec 27, 2017
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Interesting. Did you restart the router after making the change? What you are describing in classic QoS bandwidth limitation (QoS = Quality of Service ... it basically works by slow the upload of devices so no one device takes all the bandwidth). There is also a possibility that you have some QoS software on your computer. It is often advertised as software that makes games less laggy.

I didn't think of it at first, but VPN software and proxies can also slow down a connection.

There is also the small possibility that it's something in your adapter configuration, but then I would expect the download to also be slow.
 
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shoephone1

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Feb 5, 2017
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The router auto-rebooted after applying the new QoS setting, but I just unplugged/plugged in both the router and the modem for good effect -- no change. I only have a few devices on my internet in general, so it's not important for QoS to be enabled. You don't think that the Netgear USB Control Center program would have an effect on wired ethernet? Otherwise, I don't think I have any QoS software.

I don't use a VPN.
 
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anotherdrew

anotherdrew

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Dec 27, 2017
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Well darn ... so into the weeds we go.

In your search bar (next to what is left of the start button) type "Device Manager" and open it. Look for Network Adapters and click it. You will likely see a number of adapters. Look for your Ethernet adapter (Killer GB or something similar). Right click it and select properties. In properties, select the Advanced tab. Here you will see a long list ... we are looking for 2 or 3 things:
Jumbo frame : if enabled, set this to disabled ... kind of a hit or miss thing.
Large Send Offload v2 (IPv4): if enabled, set this to disabled
Large Send Offload v2 (IPv6): if you have IPv6 ??? if enabled, set this to disabled.

Save, restart, and retest ... my fingers are crossed.
 
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shoephone1

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Feb 5, 2017
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Alright, so I went in to the properties for my Killer E2500 Gigabit Ethernet Controller, and set both Large Send Offload v2 (IPv4) and Large Send Offload v2 (IPv6) to "disabled". Jumbo Frame was already disabled. I rebooted my machine and tested the ethernet speed -- to no avail. Still generally 0.2-0.5 mbps.

I did notice that I also have Large Send Offload (IPv4) (not "v2), and it is enabled. I haven't touched that.
 
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anotherdrew

anotherdrew

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Give it a shot (I'm getting desperite), but also look for something in "add or remove programs" ... The killer E2500 sometimes comes with the "killer suite" installed. This software is does some QoS and is mostly useless ... trying uninstalling it if you see it.
 
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bill001g

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Aug 9, 2012
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Killer chipsets are known from all kinds of strangeness on their nics. They have a history of bugs, they fix one and break something else. The killer suite can not be completely uninstalled. The only way to do that is to go to their site and down load the drivers without the killer features.

 
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shoephone1

Honorable
Feb 5, 2017
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Gentlemen! I have good news!

I googled the problem and found this website: https://www.killernetworking.com/driver-downloads/kb/faq/101-slow-ethernet-upload

I went through the prompts, and I'm actually getting about 10 mbps upload! The speed did drop slightly during the test (it spiked to 15 mbps, then dropped to 10), but it did succeed in getting much faster upload speeds.

Thank you for you assistance, gentlemen! I greatly appreciate it.
 
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anotherdrew

anotherdrew

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Dec 27, 2017
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Great news. In upload speed tests it is normal to see high bandwidth that slows to a more moderate speed. What is happening is that your router has buffers (extra memory) and can take a bunch of data to start. It uploads the data from the buffers at the predetermined speed (aka ... what you pay for). After the buffers are full, you can only upload as fast as the buffers empty out (pretty much the speed of your upload). This is commonly referred to as buffer bloat and is a source of lag for our gaming friends. Imagine that I send data to be uploaded. It gets stored in a buffer for a while and then is finally sent along. Not great for gamers. Blah blah ... I ramble on ... time for bed.
 
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bill001g

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Aug 9, 2012
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Glad to see you fixed it.

Why does killer constantly seem to have these problems. I would still recommend you download and install the drivers that completely remove all the killer features.

.....It it surprising the number of questions on just this forum that the magic "fix" to ethernet problems with killer chipset is drivers. It convinces me even more than any motherboard that has killer nics is immediately off my list to purchase.
 
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winelife

Feb 19, 2023
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anotherdrew said:
Jumbo frame : if enabled, set this to disabled ... kind of a hit or miss thing.
Large Send Offload v2 (IPv4): if enabled, set this to disabled
Large Send Offload v2 (IPv6): if you have IPv6 ??? if enabled, set this to disabled.

Save, restart, and retest ... my fingers are crossed.
Click to expand...
Stopping by to say thanks @anotherdrew for this post almost five years ago. It just solved an upload problem with my Killer E2400, where speeds suddenly went from 18 Mbps to less than 0.5 Mbps. I tried all kinds of things, then found this thread.

I actually followed this, then your next advice to also disable the Large Send Offload (IPv4) -- without the v2 -- and that finally worked. Cheers, mate.
 
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