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Windows 7: Slow wireless file transfer speed


02 Feb 2010   #1

Windows 7 Professional x64
 
 
Slow wireless file transfer speed

Hi,

I am new to windows 7 and I am experiencing a small network problem. I can only transfer files with 1,3MB/s which is only like 20% of what 56Mbps should teoretically perform.

Here is my setup:
Computer A: Laptop - connected with wireless-n (144 Mbps according to network and sharing center) - win 7 prof 64-bit
Computer B: Desktop - coneected with wireless-b (56 Mbps according to network and sharing center) - win 7 prof 64-bit
Router: Linksys WRT160N V2

I am really disapointed that I can't even get 50 or 75% out of the teoretically speed

My System SpecsSystem Spec
.

02 Feb 2010   #2

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

There's a little confusion on what the terms mean.

First off, when Windows shows a connection at 144Mbps, it refers to 144 Mega *bits* per second. Notice the small "b": Mbps.

Data transfers however tend to be measured in Mega Bytes per second: MBps - See the big "B"?

Wireless speeds for 802.11g top out at a 54Mbps data rate. But actual throughput is about half that, 25Mbps at best. Convert that to MBps and you get something around 3MBps. This is on a good day, with the wind at you back on every other 2nd Tuesday in leap year.

If you share the wireless connection with other devices (Like another laptop), all bets are off. It can and will be considerably less. Also take into account interference from other wireless routers, other devices like cordless phones in the same band, microwave ovens, etc. and the number goes down even more.

In your case, the bottleneck is Computer B with it's 802.11g connection. Since you already have an 802.11n wireless router and 802.11n on the laptop it's worth it to swap the wireless card on the desktop or just wire it directly to the router if you can. Be advised though, in order to get full speeds on 80.211n the ethernet connection to the router must be Gigabit Ethernet.
My System SpecsSystem Spec
02 Feb 2010   #3
aem

Windows 7 Ultimate 64Bit
 
 

I usually blame my ISP for speed issues, and perhaps the overdue non payment of my internet bill.
My System SpecsSystem Spec
.


03 Feb 2010   #4

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

Quote   Quote: Originally Posted by aem View Post
I usually blame my ISP for speed issues, and perhaps the overdue non payment of my internet bill.

My System SpecsSystem Spec
11 Feb 2010   #5

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by RedBirdDad View Post
Wireless speeds for 802.11g top out at a 54Mbps data rate. But actual throughput is about half that, 25Mbps at best. Convert that to MBps and you get something around 3MBps. This is on a good day, with the wind at you back on every other 2nd Tuesday in leap year..
I wrote: I can only transfer files with 1,3MB/s which is only like 20% of what 56Mbps should teoretically perform. So there is no confusion on what the terms mean.

Quote   Quote: Originally Posted by RedBirdDad View Post
In your case, the bottleneck is Computer B with it's 802.11g connection. Since you already have an 802.11n wireless router and 802.11n on the laptop it's worth it to swap the wireless card on the desktop or just wire it directly to the router if you can. Be advised though, in order to get full speeds on 80.211n the ethernet connection to the router must be Gigabit Ethernet.
I know computer B is the bottleneck that is why I wrote I would atleast expect the transfers to be atleast 50% of the teoretically speed of 54Mbps. But since my last post the transfer rates has all gone to hell - 200kb/sec at tops which is very very very slooow - please give some advice...
My System SpecsSystem Spec
11 Feb 2010   #6

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by aem View Post
I usually blame my ISP for speed issues, and perhaps the overdue non payment of my internet bill.
I don't see what my ISP should have to do with file transfers on a local network???
My System SpecsSystem Spec
11 Feb 2010   #7

 

Most routers by default will limit file transfer speed to about 20% of the available bandwidth. 20% of 54 Mb/s is 10.8 Mb/s which works out to 1.35 MB/sec. hope that answers your question
My System SpecsSystem Spec
11 Feb 2010   #8

 

It's wireless...
My System SpecsSystem Spec
11 Feb 2010   #9

 

Quote   Quote: Originally Posted by brady View Post
It's wireless...
Of course it's wireless. If it were a wired connection it would be either 100Mb/s or 1000Mb/s.. of which only 20% would still be available for a single, one-way file transfer between two connected computers. With a wireless connection.. the available bandwidth drops proportionally with the strength of the signal.
My System SpecsSystem Spec
11 Feb 2010   #10

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by madtownidiot View Post
Most routers by default will limit file transfer speed to about 20% of the available bandwidth. 20% of 54 Mb/s is 10.8 Mb/s which works out to 1.35 MB/sec. hope that answers your question
well right now I would be satisfied with 1.35MB/s but I only get 100kb/s
My System SpecsSystem Spec
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