Forum Discussion
sudden slow internet speed on windows 11
How can I get back to Windows 10 and get back my decent internet access speed.
J_Mag2195
Have the same problem, installed windows 11 on a spare M.2 drive so have dual boot Winndows 11 and Windows 10 on the same PC. All settings for the RealTec ethernet nic are the same.
Windows 10 gives 398Mbs over RealTec 2.5gb ethernet
Windows 11 gives 79Mbs over RealTec 2.5gb ethernet
Which leads me to conclude Windows 11 is still buggy after over a year from launch
philb20 i tried all methods written here , i was about to give up then suddenly i saw drivereasy software name then i though whynot give it a try as last attempt cause in past use to have win10 i didn't trusted windows updates for graphic driver as it gave always outdated driver so i installed iobits driver booster software and it was good
driver easy listing for ethernet driver
before speedtest result :
after installed drivereasy and updating drivers (restarting pc) speedtest result :
edit : it worked only for a day and now i'm on same 18-20 mbps as before- I have a Dell XPS with the Killer network adapters and disabling that, along with the optimized setting within TCP Optimizer seemed to do the trick for me. Using MLab as my benchmark, I am now getting back to normal speeds. Try them all. Thanks all!
Anytime i update or re-install network drivers i use the nice TCP OPTIMIZER... and works very well. Changed all values to 1000/1000 and in the drivers advanced options inside device management i disabled or enabled various values... now works perfect.
For example: Flux control, Green Ethernet, Large send offload... all this disabled, exist others values have an impact on latency or speed for example.
I use TCP Optimizer (free download at speed guide.net or Google).
Run as Administrator. Max out connection speed (near the top under General Settings tab). Next to Choose Settings, click Optimal
Apply changes at the bottom, reboot. Nice and easy. Works for me every time. if settings go back for some reason, just do it again.
TCP Optimizer didnt improve windows 11 ethernet speed.
Its the same hardware just a dual boot system , so not hardware, not cable, not router its all identical between Win 10 and 11, I have latest RealTek drivers for win11
But windows 11 ethernet runs 5x slower than on same system for windows 10
philb20 Not so sure about that. After dealing with this issue for months and having to install/reinstall drivers repeatedly, it seems one of the later updates (windows or driver; not sure which) fixed the issue. It's been months now since I've seen the slow-down. Wish I could provide more guidance as to what fixed the issue, but it seems to have been resolved.
One thing to note though - I've been using an app called Driver Easy for my driver updates. It seems to pick up driver updates long before Windows update or any of the other update programs do. Maybe try it and see if the drivers it selects fixes the issue.
