How to Change the Limit Reservable Bandwidth in Windows

Update: It has been brought to my attention from a collegaue that the idea of QOS taking up 20% of the bandwidth is actually a myth. Microsoft has an official response to this that you can read here and it’s been debunked on LifeHacker as well.

For their own use, Microsoft by default reserves 20% of your bandwidth for QOS or Quality of Service usage like Windows update.  Well I don’t usually use Windows Update on a daily basis and I don’t think a majority of users do, so why reserve a bandwidth for it?  To remove this limit, open up the Run interface then enter “gpedit.msc”:


This opens the group policy editor window. Under the Local Computer Policy choose Computer Configuration > Administrative Templates > Network > QOS Packet Scheduler > Limit Reservable Bandwidth. My screenshot below should guide you if you get lost on the navigation tree:


This will open the Limit reservable bandwidth window and you will see that by default it is not configured.


So why would you change a limit if it is not configured anyway?  Well you can see the reason if you click the explain tab:


…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.

Now that we know that limit is indeed 20% by default, go back to the Setting tab then choose enabled > then put a zero value on the limit then click OK:


I am yet to benchmark the results of this setting.  In theory it should add 20% to your bandwidth by removing this limit.

Ben Carigtan shows you how it’s done.

Comments [9]

  1. Thanks your great tips.The world need more people like you….

  2. I tried to enter "gpedit.msc" and I get no such file. I am using Win7 pro x64. Any suggestions?

  3. Just in search type group policy and there’s gonna popup a window with local group policy. You are welcome :) Phaser1701

  4. Dude even though i’ve made the system reserved to 0% my internet is the same speed ……

  5. dont put 0%.. the windows still set as default value.. should 10% or 5%..

  6. If you guys use win7.. don’t put 0%.. I think..

  7. I use 0% for windows 8
    works perfectly

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