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Speed Tweaks
"Just go faster, faster, don't be slow
Rev it up, rev it up 'til your engine blows"
Shania Twain, "You Win My Love"
Windows NT Registry Settings
If you are using Windows 2000, follow the same directions as if you were using Windows NT.
Tweaking a Windows NT/2000 system will produce less dramatic results than on a Windows 95/98 system. This is because Windows NT/2000 is already optimized for networking.
To start, open regedit and go to the following key: HKEY_LOCAL_MACHINE --> SYSTEM --> CurrentControlSet --> Services --> TCPIP --> Parameters
You will be adding a new value to this key.
- Make sure you have the key selected. Using the Edit pull-down, select Edit -> New DWORD Value
- New Value #1 will appear as the name of this value.
- It should be highlighted for you to name it. Otherwise, Select Edit -> Rename. Name the value "TcpWindowSize"
- Double-click TcpWindowSize and fill in 64240 in the presented value data box. Click on Decimal value to indicate that the value is a DWORD decimal variable type. Click here for a picture
- Other recommended settings from getspeed.net are 64240, 32120, and 8760, in that order.
Using the same method defined above, you will set the following values:
EnablePMTUDiscovery="1" Type: DWORD Decimal Variable
This is a Boolean (true/false) value. Set it to True (1) for maximum throughput. A setting of False(0) will send fixed packets of 1500 as set by the MTU. Make sure you click on Decimal value and NOT Hexidecimal. Click here for a picture
EnablePMTUBHDetect="1" Type: DWORD Decimal Variable
Another Boolean value. Set it to True(1) if you set EnablePMTUDiscovery=1 above. Make sure you click on Decimal value and NOT Hexidecimal. Click here for a picture
The next key relates to your specific network device. To set this variable you need to know the model of your Internet adapter. Go to: HKEY_LOCAL_MACHINE --> SYSTEM --> CurrentControlSet --> Services --> Adapter Name --> Parameters --> TCPIP
MTU="1500" Type: DWORD Decimal Variable
MTU is a DWORD Decimal Variable. Don't set values larger than the default for the underlying network as they will default to the network MTU. Make sure you click on Decimal value and NOT Hexidecimal. Click here for a picture
Note: speedguide.net notes that if your are a DSL user and your ISP uses PPPoE (Point-to-Point protocol over Ethernet), you should set your MaxMTU value to 1492 or less. Other sources say use 1500 if your connection exceeds 128k. We have not tested this with PPoE so don't have a recommendation.
