Jan 20, 2020
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Hello, first time asking on the forum. These threads have helped me in the past, but I can't seem to find support for my issue... So here I am.

I'd like to think that I've narrowed down my issue and determined it's a software or hardware issue with my LAN port (hopefully not the latter). It's almost like there's a VSync enabled but for my download speed. Just to clarify, I'm not having any connection issues, I've just become obsessed with finding the culprit.

soft/HARDware:
  • OS: Windows 10 Home - v1903
  • ISP: Spectrum - 200 Mbps down//15 Mbps up
  • Motherboard: MSI Z170A Gaming M5
    • Port: Killer E2400 Gigabit Ethernet Controller
  • Router: Netgear Nighthawk AC2600
  • Ethernet Cables: CAT 5e
Troubleshooting:
  • Speed tests from my PC from several sites show consistent ~100 Mbps down//~15 Mbps up
  • Speed tests from other devices on my network more accurately represent ISP package (sometimes even faster)
    • Devices tested: Xbox OneS (wired), Samsung Galaxy S10e (5 GHz wireless), iPad Pro 11 (5 GHz Wireless)
  • Swapped Ethernet cables between PC and Xbox to test faulty cables/ports, no noticeable change
  • Scanned for Network Adapter driver updates through Device Manager, "Best drivers are already installed"
    • "Speed & Duplex" is set to "Auto Negotiation"
    • Additionally, disabled and re-enabled network adapter through Device Manager, no noticeable change
  • Attempted to update BIOS, no noticeable change, though I'm not entirely sure if the update was successful (I'm not very experienced in the BIOS)
This is all the information I could think of off the top of my head, but if more is needed let me know and I'll try to provide.
 
Jan 20, 2020
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Hello once again, all.

After weeks of obsessive struggle and dealing tech support, I finally just gave my operating system a clean install and boom. Consistently getting 230+ Mbps now.

Yeet.
 
Jan 20, 2020
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Troubleshooting:
  • Speed tests from my PC from several sites show consistent ~100 Mbps down//~15 Mbps up
  • Speed tests from other devices on my network more accurately represent ISP package (sometimes even faster)
    • Devices tested: Xbox OneS (wired), Samsung Galaxy S10e (5 GHz wireless), iPad Pro 11 (5 GHz Wireless)
  • Swapped Ethernet cables between PC and Xbox to test faulty cables/ports, no noticeable change
  • Scanned for Network Adapter driver updates through Device Manager, "Best drivers are already installed"
    • "Speed & Duplex" is set to "Auto Negotiation"
    • Additionally, disabled and re-enabled network adapter through Device Manager, no noticeable change
  • Attempted to update BIOS, no noticeable change, though I'm not entirely sure if the update was successful (I'm not very experienced in the BIOS)
Additionally, I've tried bypassing the router, but PC still only gets ~100 Mbps
 

kanewolf

Titan
Moderator
Additionally, I've tried bypassing the router, but PC still only gets ~100 Mbps
What does the network status show your link rate? If it is showing a 100Mbit link rate then you probably have a cable problem. Do you have a direct connection or is there in-wall cabling? Do you have a "flat" ethernet cable? Either in-wall or flat cable could be the problem.
 
Jan 20, 2020
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What does the network status show your link rate? If it is showing a 100Mbit link rate then you probably have a cable problem. Do you have a direct connection or is there in-wall cabling? Do you have a "flat" ethernet cable? Either in-wall or flat cable could be the problem.
I don't have direct knowledge of my current network status but last I was aware (explained below) I'm getting 200+.
There is in-wall cabling.
I have both flat and round CAT 5e cables, and there has been no noticeable differences between the two.

I first discovered this about a week or two ago (who knows how long prior this has been happening) when I had a Support Tech come out and fix some intermittent issues. He ended up replacing some cables in the cable box attached to my apartment building to solve the connection problem. When running tests to confirm the network was stable, he noticed that my PC wasn't getting the proper speeds. He tested link rates at each point, from the outdoor cable box through my router and there was no issues until it reached my PC. Currently, my layout is something like:
Building Cable Box>Apartment Unit>In-Wall Connection>Modem>Router>PC
 

kanewolf

Titan
Moderator
I don't have direct knowledge of my current network status but last I was aware (explained below) I'm getting 200+.
I was asking to you verify the network status in Windows on your PC -- https://winaero.com/blog/see-the-ethernet-or-wifi-adapter-speed-in-windows-10/

Since you say you have in-wall cabling, that is the first place to start. Unscrew the ethernet jack from the wall and examine the wiring. Does it look like all 8 wires are connected? Troubleshooting in-wall wiring often requires a simple tester like this to troubleshoot -- https://www.amazon.com/gp/product/B004CI9NRM/ You can verify that all 8 wires, all 8 are REQUIRED for gigabit speed, are connected.
 
Jan 20, 2020
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I think I've narrowed it down more. I tried manually installing my NIC Driver by download the Driver Only Installation for my system ( https://support.killernetworking.com/download/killer-drivers-installation-64bit/ ). However, when looking at my NIC driver properties after installation, I notice the driver version is still out of date, and the driver date is from September 2016 (even though the driver date from the website is December 2019).
 

kanewolf

Titan
Moderator
If the "Ethernet Status" window is what you're referring to, then yes I have 1 Gbps, though it shows no IPv6 connectivity (not sure if that's relevant).
OK. If you have 1Gbit physical connectivity then the network adapter is not the limiting factor. Yeah, I think there is something about that Killer network hardware. I have never had that hardware so I don't have a lot of experience. Maybe searching for other Killer 2200 threads on this board would provide some help.
 
Jan 20, 2020
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OK. If you have 1Gbit physical connectivity then the network adapter is not the limiting factor. Yeah, I think there is something about that Killer network hardware. I have never had that hardware so I don't have a lot of experience. Maybe searching for other Killer 2200 threads on this board would provide some help.
I looked at that thread and saw that their issue was different LAN port speeds on their router. Through my Router settings I can see that LAN Port 1 (PC) and LAN Port 2 (Xbox) are both getting full 1000M. Ports 3 and 4 are disconnected.

Out of curiosity, under "Speed & Duplex" in the Device Manager, should there be an option for 1000 Mbps Half/Full Duplex? I'm only seeing 10 Mbps Half/Full, 100 Mbps Half/Full, and Auto Negotiation.
 

kanewolf

Titan
Moderator
Jan 20, 2020
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No. "Auto Negotiate" is the best option. Forcing port speeds on PCs usually results in problems.

Have you run through this troubleshooting guide -- https://support.killernetworking.com/knowledge-base/slow-network-speeds/
I've just attempted that guide to no avail, keep hitting a ceiling at 100 Mbps. I will follow directions at the bottom of the page though and reach out to the manufacturer.

Meanwhile, I've tried playing around with even more BIOS and other settings including:
  • XMP
  • LAN Port ROM
  • Game Boost
  • Reinstalling BIOS update (again)
  • Installing Killer Network Manager (the program everyone else with my issue has problems with)
  • Uninstalling Network Adapter all together
    • Tried installing an Intel driver instead, but was not supported
    • Also tried installing the driver in Safe-mode, but still not successful
  • Played with other Advanced Ethernet Properties but no noticeable change
Could the Mobo LAN Port/Driver have CAT 5e compatibility issues? I don't see why it would, but I'm considering buying a CAT 7-2 pack on Amazon for like $7 so worst case scenario, I spend $7 for no improvements, but I future-proof myself a little.
 
Jan 20, 2020
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No. You eliminated that possibility by verifying that your network adapter is running at gigabit.
You could try booting into safe mode with networking or you could try a linux live CD. Those two steps can help "prove" that it is a software problem and not a hardware problem.
For another day, my friend. I've blown my entire day off of work trying to nail this, lol.
 
Jan 20, 2020
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Can you confirm that you are connecting to your Netgear router and not the cable modem if it has Wi-Fi? If the cable modem is old enough, it could have a 100mb ethernet WAN port, but still have 5Ghz Wireless N 300Mb allowing for 200Mb over Wi-Fi only.
Yes, I am positive I'm connecting to my router (personally named it). I opted out of leasing a modem with wireless capabilities. Additionally, I can access my modem's IP and see that that there is no wireless option, and that full 1000 Mbps is provisioned and LAN enabled.
 
Jan 20, 2020
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No. You eliminated that possibility by verifying that your network adapter is running at gigabit.
You could try booting into safe mode with networking or you could try a linux live CD. Those two steps can help "prove" that it is a software problem and not a hardware problem.
I'd spoken with a Killer Network support tech and they had me run a diagnostic and could tell that my driver was corrupted. They had me run a cleaning program a few times and reinstall the correct driver. It seems I was successful there, though I'm still only getting 100 down.

Also, you were right about the Ethernet cables, not that I didn't trust you or anything, but I just got a pair of CAT 7 cables, hooked them up modem to router, and router to PC. I've noticed a significant jump in network consistency, but not speed. Just thought to throw that out into the universe.
 
Jan 20, 2020
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Hello once again, all.

After weeks of obsessive struggle and dealing tech support, I finally just gave my operating system a clean install and boom. Consistently getting 230+ Mbps now.

Yeet.
 

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