Slow wired upload speed vs Linux on same hardware

Hi,

Thanks for posting here.

In general, there are several reasons may cause upload speed slow.

I would suggest you try the following method to see if the upload speed can be returned to normal.

Option 1

Open Control Panel > Network and Sharing Center > Change adapter settings > Right click the adapter that you need check > click Properties > click Configure > in Advanced tab, locate to Speed & Duplex > select the value 10 Mbps Half Duplex > click OK to see if the issue can be resolved.

Option 2

Press Windows+R to open Run, insert gpedit.msc, click OK to open Local Group Policy Editor > Computer Configuration > Administrative Templates > Network > QoS Packet Scheduler > right click Limit reservable bandwidth > click Edit > select Enable and set Bandwidth limit to 0 > click Apply and OK

Option 3

Click Start, insert cmd to open a CMD window with administrator privilege and please insert the following command and press enter

netsh interface tcp set global autotuning=disabled

Then in the same CMD window, insert command regedit to open Registry Editor

Locate to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\AFD\Parameters

Right click to create a new DWORD Value, Value name: DefaultSendWindow, Value data: 1640960, Decimal.

Click OK and Reboot the machine to see if the issue can be resolved.

Option 4

Repeat the first two steps of Option 3 to open the Registry Editor

Locate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings

Right click to create a new DWORD Value, Value name: SocketSendBufferLengt, Value data: 4000, Hexadecimal.

Click OK and Reboot the machine to see if the issue can be resolved.

Best Regards,
Sunny Qi

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I have the same issue.

under windows 10 (latest updates), max upload is about 6-7mbps

an android emulator under windows gives me about 30mbps up

the same machine booted into Linux is about 50-60mbps up

iPhone also clocks in at about 50-60mbps up and similarly iMac

fastest upload speed recorded (not sure which machine), was about 100mbps up, so the link is capable of much higher speeds...

and all are about 80-100mbps download

my internet connection is not limited or throttled at a certain rate, it is an 8-mile microwave link, and varies a bit, yet never got any lost packets.

I tried everything in this (and other guides, which give similar instructions) and no change for windows, yet the android emulator upload is now only 20mbps...

Hi,
if you have already tried all the suggestions that have been proposed here to no avail, you can try this path:
Settings> Update & Security> Advanced Options> Delivery Optimization> Advanced Options> Download / Upload Settings, move the slider of the different items to higher percentages or according to your needs.

Hi,

Thanks for your feedback.

If the issue still existed after updating settings per above suggestions, collecting network traffics should be necessary for further investigating. However, analysis of network traffic is beyond our forum support level. So I would suggest you contact Microsoft Customer Support and Services where more in-depth investigation can be done so that you would get a more satisfying explanation and solution to this issue.

You may find phone number for your region accordingly from the link below:
https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers

Best Regards,
Sunny

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This is weird. I have just the exact problem. I have a 1000/400 fiber to my house and within the country I get the full upload speed, however internationally I only get around 50-80Mbps on ANY Windows 10 or Windows Server machine. On MacOS or Linux I get the full 400Mbps. This pretty crazy. I dont think latency is any issue as its pure fiber. We are looking in to this as well.