Speeding up xDSL/Cable broadband in Windows 2000/XP/2003

If you have cable or xDSL broadband, then you can drastically speed up your connection with the following instructions.

There are three methods to this solution: The Completely Manual Way (hardest), The Semi-Automatic Way (easy), The Fully Automatic Way (easiest)

The Completely Manual Way

1. Go to Start > Run
2. Type regedit.exe in the box and press ENTER.
3. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
4. Create a new DWORD value SackOpts with value 1
5. Create a new DWORD value TcpWindowSize with value 5ae4c
6. Create a new DWORD value Tcp1323Opts with value 3
7. Create a new DWORD value DefaultTTL with value 40
8. Create a new DWORD value EnablePMTUBHDetect with value 0
9. Create a new DWORD value EnablePMTUDiscovery with value 1
10. Create a new DWORD value GlobalMaxTcpWindowSize with value 5ae4c
11. Close Registry Editor and reboot your computer.

The Semi-Automatic Way

Copy the following into a text editor (e.g. Notepad) and save as “netspeedup.reg” (with quotes).

REGEDIT4

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"SackOpts"=dword:00000001
"TcpWindowSize"=dword:0005ae4c
"Tcp1323Opts"=dword:00000003
"DefaultTTL"=dword:00000040
"EnablePMTUBHDetect"=dword:00000000
"EnablePMTUDiscovery"=dword:00000001
"GlobalMaxTcpWindowSize"=dword:0005ae4c

Double-click the file in Windows Explorer and click Yes at the prompt.

The Fully Automatic Way

Download the file: dslcable_speedup.reg (scanned for viruses using ClamWin on 2007-08-05), and open it, clicking Yes at the prompt. Reboot your computer.

External links

• TCP/IP and NBT configuration parameters for Windows XP