How to speed up your 802.11n connection

If you've upgraded your wireless networking equipment to the latest and fastest standard, 802.11n, you may not have experienced the performance boost you were expecting, because by default, Windows XP is not optimized to handle the processing of the data as more bits are transferred between the WAP and NIC. You can edit the registry to turn on a feature called Receive Window Scaling that will speed things up. As always, back up the registry (use the File Export option) before making changes. Here are the instructions:
Open your registry editor.
1. Navigate to the following key: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip \ Parameters
2. Right click an empty space in the right details pane and select New DWORD value
3. Name the new value Tcp1323Opts
4. Double click the new entry and give it a hexadecimal value of 3
5. Again, right click an empty space in the right pane and select New Dword value
6. Name the new value TcpWindowSize
7. Double click the new entry and give it a hexadecimal value of 40000
8. Reboot your computer to force the changes to take effectYour network adapter should now perform faster with 802.11n routers and WAPs.