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Slow wireless transfer speed PC to PC but fast internet speed

Last response: in Networking
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July 16, 2014 7:58:45 PM

I have the next problem:
I have 50Mbps internet connection, and I can see that on speed test.com from my laptop. But if I copy a file from another PC (windows to windows) I only see 1Mbps! If I connect my laptop to the wired LAN, the same file transfer is now ~400Mbps
Why i see this????
Is not the wireless link because I can download at 50Mbps from the internet.
July 16, 2014 8:23:19 PM

It's because of your wireless router that doesnt have fast transfer speed over wirelesss. what are you on, b/g/n?
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July 17, 2014 1:37:28 AM

It almost sounds like the router is defaulting back the slowest speed due to compatibility.

I dont know what wireless standard you are using but taking G as an example although it is rated 54mbs
it can adapt on the fly to a variatey of speeds between 1 & 54
it sounds like somethings off so its reverting to the minimum speed.

I think you need to try playing with the options on your router and wireless cards to find the issue.

on the cards you will have options like rts/cts, and CTS to self . cts to self is better and normal but might cause issues.

on the router there may be things like channel width and guard interval, or mixed mode vs g or n only. try playing with these by setting them all down to basic options then slowly turning things on.

What wireless standard are you on and do both computers also suport it?
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July 19, 2014 6:09:25 AM

Thanks for your help. I have a Netgear dual band wireless n, and it does not mater how far or close I am from the router, and also I have tried both frequencies. (My think pad also has a dual band wireless N card) It is always the same, over wireless: 50Mbps of speed if I download a large file from the Internet, 1Mbps if I use windows explorer to copy a file from another PC on my home. The Other PC is connected via Gigabit Ethernet cable to the Router.
It looks to me that this is a windows problem or a windows explorer problem, because Why a protocol like FTP or HTTP will get 50Mbps and the protocol to copy files over windows file systems will be slow, using the same card.
I will also play with the rts/cts, and CTS to see if that helps.
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July 21, 2014 5:01:59 AM

You could probably find out whats going on with a wireshark capture but that's very involved. It sounds like an SMB issue.
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