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  1. #1
    Silver Lounger
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    Increase Your Broadband Connection? (XP SP-2)

    Has anyone had positive/negative experience with the following?

    Thanks, John

    Limit reservable bandwidth

    Determines the percentage of connection bandwidth that the system can reserve. This value limits the combined bandwidth reservations of all programs running on the system.

    By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default.

    If you enable this setting, you can use the "Bandwidth limit" box to adjust the amount of bandwidth the system can reserve.

    If you disable this setting or do not configure it, the system uses the default value of 20 percent of the connection.

    Important: If a bandwidth limit is set for a particular network adapter in the registry, this setting is ignored when configuring that network adapter.

    Windows reserves 20% by default

    Click Start, Run, gpedit.msc for Group Policy
    Click + Administrative Templates
    Click + Network
    Click QoS Packet Scheduler
    Double Click Limit reservable bandwidth
    Click Enabled
    Set Bandwidth limit % from 20 to 0
    Click Apply, OK
    Restart Computer

  2. #2
    Platinum Lounger
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    Re: Increase Your Broadband Connection? (XP SP-2)

    The reserved bandwidth is available for all programs to use so changing the setting does not release bandwidth for other programs. See the following MS Knowledge based article.
    Windows XP Quality of Service (QoS) enhancements and behaviour

    Quote from the article
    "There have been claims in various published technical articles and newsgroup postings that Windows XP always reserves 20 percent of the available bandwidth for QoS. These claims are incorrect. The information in the "Clarification about QoS in end computers that are Running Windows XP" section correctly describes the behaviour of Windows XP systems."

  3. #3
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    Re: Increase Your Broadband Connection? (XP SP-2)

    It's a myth (that it has any positive effect).

    Changing the value to 0 can in some cases have a negative consequence, since a program, if needed, then can not reserve the bandwidth it needs. The result: the user will not get what s/he expects, instead less performance.

    As Tony mentioned, if no program needs a specific amount of bandwidth, all is free to all programs, even if reservation is at 20 %. And if some program that uses QoS needs a specific amount of bandwidth, it will get it within the reservation limit, and it will release it as soon as finished.

    See Raymond Chen's comments at The Old New Thing: Placebo setting: QoS bandwidth reservation

    The best way to get maximum bandwidth would probably be to not use every available program at the same time; streaming movies, chatting, downloading, etc. With this reservation a user at least can get the performance from a program that the user expect it to give.

    Regards,

  4. #4
    Silver Lounger
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    Re: Increase Your Broadband Connection? (XP SP-2)

    Thank you both for the information

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