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Thread: Problem of speed with Belkin wireless notebook network cards

  1. #1
    Junior Member
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    Question Problem of speed with Belkin wireless notebook network cards

    Hi,

    I've recently bought a new wireless routeur (Belkin wireless G+ Mimo router F5D9230-4 ver. 3000fr). I also owned a wireless notebook network card (model F5D7010 ver.1314uk) which I bought a few years ago.
    I recently decided to buy a more modern card thinking that it would improve the performances of my connexion (model F Card model F5D9010 ver. 3000fr).

    My laptop is running on windows xp SP2

    My problem is that I am getting a much faster connexion (factor of 2 to 3 in download) with the old card than with the new card although I used TCP Optimizer on both of the cards.
    Here is what I get with TCP analyser for both cards

    Card model F5D7010 ver.1314uk:
    SpeedGuide.net TCP Analyzer Results
    Tested on: 10.30.2007 04:38
    IP address: 81.64.xxx.xxx

    TCP options string: 020405b40103030401010402
    MSS: 1460
    MTU: 1500
    TCP Window: 1027840 (multiple of MSS)
    RWIN Scaling: 4
    Unscaled RWIN : 64240
    Reccomended RWINs: 64240, 128480, 256960, 513920
    BDP limit (200ms): 41114kbps (5139KBytes/s)
    BDP limit (500ms): 16445kbps (2056KBytes/s)
    MTU Discovery: ON
    TTL: 40
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)


    Card model F5D9010 ver. 3000fr
    SpeedGuide.net TCP Analyzer Results
    Tested on: 10.30.2007 04:31
    IP address: 81.64.xxx.xxx

    TCP options string: 020405b40103030401010402
    MSS: 1460
    MTU: 1500
    TCP Window: 1027840 (multiple of MSS)
    RWIN Scaling: 4
    Unscaled RWIN : 64240
    Reccomended RWINs: 64240, 128480, 256960, 513920
    BDP limit (200ms): 41114kbps (5139KBytes/s)
    BDP limit (500ms): 16445kbps (2056KBytes/s)
    MTU Discovery: ON
    TTL: 40
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)


    Could someone tell me what is wrong with the new card? Why can't I get better performances with the new card or at least as good as with the old card? This is crazy for me

    Thanks in advance for your precious help

  2. #2
    Moderator YeOldeStonecat's Avatar
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    Updated firmware on the router?
    Have you tried different wireless modes on the router?
    What level of security being used?
    Tried changing channels..such as 1 or 11?
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  3. #3
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    Quote Originally Posted by YeOldeStonecat View Post
    Updated firmware on the router?
    Yes firmware is up to date


    Quote Originally Posted by YeOldeStonecat View Post
    Have you tried different wireless modes on the router?
    Yes I did but it turns out the same ... the old card has better performances in download speed

    Quote Originally Posted by YeOldeStonecat View Post
    What level of security being used?
    WPA-PSK TKIP

    Quote Originally Posted by YeOldeStonecat View Post
    Tried changing channels..such as 1 or 11?
    Yes I did but whatever channel I use the download speed is crap with the new card and much better with the old card

    Note that I just swap the cards and compare using same laptop at the same place of the house were reception is excellent
    I just do not understand

  4. #4
    Elite Member trogers's Avatar
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    Quote Originally Posted by Jezh View Post

    TCP options string: 020405b40103030401010402
    MSS: 1460
    MTU: 1500
    TCP Window: 1027840 (multiple of MSS)
    RWIN Scaling: 4
    Unscaled RWIN : 64240
    Reccomended RWINs: 64240, 128480, 256960, 513920
    BDP limit (200ms): 41114kbps (5139KBytes/s)
    BDP limit (500ms): 16445kbps (2056KBytes/s)
    MTU Discovery: ON
    TTL: 40
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)
    TCP Window set to 1027840 is very high. Unless you have a subscribed speed of 40 mbps or higher use the following TCP Window settings:

    64240 - 2 to 3 mbps
    128480 = 4 to 6 mbps
    256960 - 8 to 12 mbps

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