Windows 10: SLOW SMB file copy speeds using 5G WIFI vs wired lan

Hi, i'm getting very slow WIFI copy speeds compared to using wired LAN, I get about 125mB/sec megabytes over LAN which correctly equates to 1000mbps as I have a gigabit network but only 15mB/sec megabytes which equates to only about 130mbps, this is regardless of how close I am to the router.My router is WIFI 5.0 ac compatible and so I should be expecting probably about 60-70 mB/sec local SMB file copy speeds in real terms over WIFI as i'm told. I'm using a surface pro connecting to 5G to run these tests, I have a generic gigabit switch and i'm using a virgin superhub 3.0To rule out any H

:)

 

Slow Internet Over Wifi. Only Internet Speed Weirdly Slowed.

Hi, Microsoft.

Wireless Environment Details

Previously, I am using Windows 7 and upgraded to Windows 10 in my Dell laptop with overall environment details as below,

• Intel® Dual Band Wireless-AC 3165 Wifi adapter, using 5Ghz band at 433Mbps.
• Using Asus RT-AC68U, performing 600Mbps (2.4GHz) + 1300Mbps (5GHz).
• Subscribing fiber optic 300Mbps ISP speed.

Problem Statements

I am facing internet speed throttled over Wifi but not wired LAN connection. The speed throttled below than 100Mbps during downloading. The Wifi weirdly throttled the internet speed only but not local network file transfer over wireless.

Test Methods and Problem Analysis.

• The laptop and router range within 2 meters away.
• No multiple devices connected to the router during the test.
• DNS set in router is Google's DNS, 8.8.8.8
• My laptop using default Windows 10 Firewall and set network to "Private".
• No VPN were used nor installed.
• All hardwares installed with latest drivers from Dell website.
• All networking speed monitored using Resource Monitor.
• Download files from internet into laptop over LAN cable. Full speed at 300Mbps.
• Download files from internet into laptop over Wifi. Speed slowed down less than 100Mbps.
• I have a desktop PC too, using Windows 10 and LAN cable connection to router.
• Transferring files from desktop PC to Asus router and finally wireless to my laptop.
  FULL SPEED around 400Mbps.
• This is so odd. Wireless file transfer over local network can be full speed but internet over wireless slowed. Obviously not Wifi adapter problem.
• I decided to further test the router hardware.
• Download files from internet into desktop PC over LAN cable. Full speed at 300Mbps.
• Download files from internet over smartphone and tablet (both Android and iOS) wireless.
  FULL SPEED at 300Mbps. Obviously not router problem too.
• So I narrowed down the problem only can be Windows 10. Can you help me identify the problems?

 

File share copy speed slow

Hi.

I have a Windows Server hosting some shares.

The server has an 10GBPS network card and hosts connected through a 1GBPS ports.

When copying files down from server the copy speeds dont pass 10 mbytes per second.

When copying files up to server the copy speeds passes 100 mbytes per second.

I have used iperf to test network speeds and it easily shows that the network speeds are indeed 1gbps.

I also tried non-smb reliant file transfer tools and they all was able to reach 1 gbps speeds with no problem.

All other file copy tools using SMB was capped at same speed.

So the problem is quite strange and i am not sure where i should look next to resolve this

Any ideas anyone?

 

File transfer speeds over LAN network (wired) - very slow, random

Checked Netbios is enabled , not on Default ? (on all PC's on Win 10 , it seems to be an issue for some)

Also if Jumbo Frame is Enabled and your Router or the other PC can't use it , it will cause issues like this . EVERY DEVICE on the LAN MUST Support JumboFrame if you use it. ie my C7 ARCHER can't.... everything else can....





If that doesn't help , this is my goto list I posted in another Thread for them to check too.

Ethernet network between 3 Windows 10 PCs problem - Page 3 - Windows 10 Forums