ClassicConnect ClassicConnect
"640k ought to be enough for everybody."
 
FAQ :: Search :: Memberlist :: Usergroups :: Register
Profile :: Log in to check your private messages :: Log in

Possible Fix For Slow SMB Speeds on Windows 11 23H2

 
Post new topic   Reply to topic    ClassicConnect Forum Index -> Software and Web Design
View previous topic :: View next topic  
Author Message
LyraNovaHeart
Gorts


Joined: 15 Apr 2025
Age: 27
Posts: 48
Location: Los Angeles, California

PostPosted: Thu Jul 17, 2025 5:17 am    Post subject: Possible Fix For Slow SMB Speeds on Windows 11 23H2 Reply with quote

Hey there! Of course, SMB had to be a little shit today, and it decided "let's be slow as fuck". Average transfer speed at first was 17MB/s (~137Mbps), then after a restart, I got around 36MB/s avg (~289Mbps). This isn't ideal, especially when both endpoints are fast enough, given my setup

Server (1 Gbps) ----> Router (1Gbps) ----> Laptop (866Mbps, 802.11ac Wi-Fi 5).

I expect more than 36MB/s, ethernet also weirdly wasn't affected, and while searching the web, I stumbled upon this command:

Code:
netsh int tcp set global rss=enabled


Decided to try it after, what do you know, somehow that fixed this mess. Went from 36MB/s to 70MB/s, much better.

Before Screenshot:




After Screenshot:


_________________
I'm one day closer to being who I wanna be~
Back to top
View user's profile Send private message Visit poster's website
alyx
Member


Joined: 07 Aug 2024
Posts: 18

PostPosted: Thu Jul 17, 2025 9:38 am    Post subject: why this works Reply with quote

just explaining what this does and why it works

this command enables rss (obvious) which is otherwise known as receive side scaling. to put it simply, it distributes network receive processes across multiple cpus in a multi processor system (keep in note this doesnt use hyperthreaded cores, so itll only make use of say, 14c in a 14c28t system

heres the microsoft article on it: https://learn.microsoft.com/en-us/windows-hardware/drivers/network/introduction-to-receive-side-scaling

why this is off by default is beyond me
Back to top
View user's profile Send private message
VCSMaster
Member


Joined: 25 May 2025
Age: 25
Posts: 126
Location: Southeastern USA

PostPosted: Sun Jul 27, 2025 7:10 pm    Post subject: Reply with quote

Interesting. I wonder if this is a new change for Windows 11, since I've never had to make this adjustment on anything I use. All my machines are networked via SMB 1.x to have the same shared storage. Even in XP I've never really noticed speeds so low.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    ClassicConnect Forum Index -> Software and Web Design All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



smartDark Style by Smartor
Powered by phpBB 2.0.25 CC Mod © 2001, 2002 phpBB Group
 
Page generation time: 0.0124s (PHP: 92% - SQL: 8%) - SQL queries: 11 - GZIP enabled - Debug on