How to Boost the Speed of Broadband Internet Connection in Windows

Broadband having a high rate of data transmission is the high-speed access to the internet used by most net users worldwide. And the broadband internet technologies which are being used in most areas are DSL and cable modems. When using these Cable Modems or DSL Routers in combination with Windows operating system, you can fine tune the TCP/IP registry entries to optimize and boost the speed of Broadband Internet Connection.


Note: Take great care while editing the registry because if you do it incorrectly, there are chances that can even render your computer unbootable.

Just follow the step-by-step instructions posted below carefully to successfully edit your registry and thus boost the speed of broadband internet connection. (caution – this is not for the faint of heart!) To see if it worked, perform a speed test before and after taking those steps (this can be done via

1.  To open Registry Editor, click Start -> click Run -> type regedit or regedt32 and click OK.

regedt32 run command

2.  From the left pane of the Registry Editor, navigate to the registry key:

3.  Now in the right pane, find the following DWORD values and edit their value data as shown below. If any DWORD value doesn’t exist, then you’ll need to create it by clicking on ‘Edit -> New -> DWORD Value’ and set the values.

Tcpip Parameters in windows Registry
  1. DefaultTTL = “80” hex (or 128 decimal)
    The default value for this is 32 or 64. Change it to 80 in hexadecimal mode.
    DefaultTTL DWORD value specifies the default time to live (TTL) for TCP/IP packets.
  2. GlobalMaxTcpWindowSize = “5ae4c” hex (or 372300 decimal)
    The default value data for this entry is 32767 decimal or less. Increase the value to 93440, 186880, or 372300. This DWORD value specifies the system maximum receive window size advertised by the TCP/IP stack.
  3. TcpMaxDupAcks = “2”
    Set the value of this entry to 2 in hexadecimal mode. This entry is used only when the receiver supports the fast retransmit feature and it generally specifies how many duplicate ACKs for the same sequence number constitute a signal to retransmit a segment.
  4. SackOpts = “1”
    The default value for this entry is 0, now set it to 1 in hex to enables support for selective acknowledgements as documented by RFC 2018.
  5. Tcp1323Opts = “1”
    This entry controls RFC 1323 time stamps and window scaling options. The default value is “3” which enable both the options. Set it to “1” in hex mode to enable windows scaling only.
  6. TcpWindowSize = “5ae4c” hex (or 372300 decimal)
    TcpWindowSize specifies the receive window size advertised by the TCP/IP stack. The default value is “7FFF” hex. As most of you use secure network behind a firewall, you can increasing this value to 93440, 186880, or 372300 decimal.

4.  Exit Registry Editor and restart Windows for the changes to take effect.

Hope this helps…
Try it yourself and post in your valuable comments.
Broadband Image Credit – Gavin St. Ours

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