Registry Home > Network

Manage the Reserved QoS Bandwidth (Windows 2000/XP) Popular

This setting determines the percentage of connection bandwidth that the system can reserve for QoS traffic. By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection.

This tweak can be easily applied using WinGuides Tweak Manager.
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Open your registry and find or create the key below.

Create a new DWORD value called "NonBestEffortLimit" and set it to the percentage (in decimal) of bandwidth to reserve for QoS packets.

Restart Windows for the change to take effect.

Note: This can be change on an adapter-by-adapter basis by creating the same value in [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{Adpater-ID}].

Registry Editor Example
|(Default)REG_SZ(value not set)|
|NonBestEffortLimitREG_DWORD0x00000032 (50)|
Registry Settings
System Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Psched]
Value Name: NonBestEffortLimit
Data Type: REG_DWORD (DWORD Value)
Value Data: Decimal Percentage (default = 20)

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Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Last modified: August 26, 2002