Hi all,
I have Asus laptop with Intel Pro/Wireless card 3945ABG network card running the latest drivers and I am connecto to a Netgear router.
My problem is that I have a 20MB internet connection and when I run a speed test ( www.speedtest.net) I get very odd results.
If i am wired directly to Modem - 19800MB
IF I am wired to the router - 15500MB
If my I use my wireless connection - 5400MB very very little.
I did the same test with a Dell Inspiron 6400 and I got same results but on the wireless test I got 15000MB. So something is wrong with my wireless connection but i dont know what. I unistalled the wireless card and drivers and Intel applications. reboot computer and it auto detect new hardware and installed using windows XP tool and still i get the same results. I have bring my router to factory defaults if case problem was with any IP routing but still I have no results. I tried with antivirus and firewall off anf the results are the same.
What can this be? Will I have to format my OS?
Any comments are appreciated.
Thanks alot.
Larbac
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Start > Run > type: "regedit" without the quotes and then press enter.
Navigate to HKLM/system/current control set/services/tcpip/parameters
Right click in right pane, select: new > Dword value.
Name it exactly: TcpWindowSize (case sensitive)
Set value to: 256000 as a decimal. (change option on right from hex to decimal then type 256000 in box.)
Reboot and enjoy.It should help your wireless speed immensely.
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What wireless card did the _Dell 6400 have?
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Yes it does work with any wireless card, it is a Windows XP issue. The default tcpwindowsize is too small for the high latency & error rate over wireless. XP's default size is designed, and works well for, ethernet.
The only side effect I have run into is some wireless routers will break the connection (motorola surfboard) with a large receive window. The tcpwindowsize setting determines how much info is received before an acknowledgement is returned (hey, I received that - send more!). If the router expects a small window size and doesn't get an acknowledgement it thinks the connection is broken. If it happens, just try a smaller window - perhaps 200K, then 150K, until the connection becomes stable. It's a night and day difference with wireless speed.
And, if it doesn't work, but it will, you can open the registry and delete the entry. No software has been installed. -
Do you believe your suggestion will work if the issue is wireless only? -
It will work precisely because the problem is only over wireless.
Weird wireless issue
Discussion in 'Networking and Wireless' started by larbac, Sep 30, 2008.