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r3x · (#10 (**permalink**))

emang kemungkinan besar ga akan ngefek koq

menurut kitab babonnya tweaking:

http://www.mdgx.com/xp1.htm

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XP PRO QOS MYTH

This applies to Windows 2000 SP4, XP Professional + 2003.
Does NOT apply to Windows 2000 Pre-SP2 and XP Home, which do not have QoS support.
Windows XP Home users can get QoS support only if they upgrade to Windows XP Professional. :-(
Windows 2000 Pre-SP2 users can get QoS support by installing Windows 2000 SP4 (free).
Windows 2003 Server and newer NT based (NTx) OSes have QoS support built-in.
Unfortunately this so-called "bug" and its "fix" are just another urban myth.
More info:

DSL Reports.

TweakXP.

THE MYTH:Some claim Microsoft reserves/wastes 20% of your internet/network bandwidth for the QoS (Quality of Service) Packet Scheduler, even if this service is disabled.
And they tell you to increase your overall bandwidth by doing this:

Log in as Administrator.

Click the Start button -> Run -> type gpedit.msc -> hit Enter or click OK.

Go to Local Computer Policy -> Administrative Templates -> Network -> QoS Packet Scheduler.

In the right hand pane double-click on "Limit reservable bandwidth".

On the Setting tab check the Enabled box.

Change "Bandwidth limit %" to read 0.

Click OK and close gpedit.msc.

Go to Start -> My Computer -> My Network Connections -> View Network Connections -> right-click on your connection -> select Properties (where your protocols are listed) -> make sure QoS Packet Scheduler is enabled.

Reboot for these changes to take effect.

THE TRUTH:Microsoft does NOT reserve NOR use ANY amount/percentage of your bandwidth for the QoS Packet Scheduler, UNLESS the QoS service is actively transmitting/receiving ANY data/packets between your computer (which MUST use a QoS aware program) and the QoS enabled internet/network (if any).
This is achieved through a series of PATH and RESV refresh messages sent back and forth over the connection.
Therefore this is NOT a "bug" and its so-called "fix" above is NOT necessary!
Learn more about QoS from the "horse's mouth":

MSKB: Windows XP QoS Enhancements and Behavior.

MSKB: QoS Traffic Control in Windows 2000.

MSKB: Description of Reservation State in RSVP.

FYI: "This does NOT increase bandwidth whatsoever, UNLESS your network administrator (I have yet to find any companies using QoS) is running on a QoS enabled network, and in this case you want it enabled anyway, to allow your PC to take advantage of this service of higher quality packets."
[Thank you Nathan!]