WOW Latency, here is what to do.

After installing Windows 7 RC1 I found these instructions to be perfect. Took my latency of 300ish to 100ish.

  1. From a command prompt run “regedit”
  2. Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters\Interfaces
  3. Browse the items under interfaces until you find one that has an IPAddress entry matching the network interface you want to affect
  4. Right-click on the interface and select New > DWORD (32-bit) Value, name it “TcpAckFrequency”
  5. Right-click the new TcpAckFrequency value and select Modify, enter “1? (Hexadecimal radio button should be selected)
  6. Right-click on the interface and select New > DWORD (32-bit) Value, name it “TCPNoDelay” (note that TCP is all uppercase this time – that’s intentional)
  7. Right-click the new TCPNoDelay value and select Modify, enter “1? (Hexadecimal radio button should be selected)
  8. Verify that both TcpAckFrequency and TCPNoDelay now show up in the adapter’s property list with types REG_DWORD and values 0×00000001
  9. Exit regedit
  10. Go to the Windows Control Panel > Programs and Features > click the “Turn Windows features on or off” link (may be named slightly different in Vista)
  11. Find “Microsoft Message Queue (MSMQ) Server” and check the box to enable it, also enabling all the child checkboxes under it
  12. Exit Windows features and reboot your PC (you must reboot before the next step is possible!)
  13. After rebooting, from a command prompt run “regedit” again
  14. Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSMQ\Parameters
  15. Right-click on Parameters and select New > DWORD (32-bit) Value, name it “TCPNoDelay”
  16. Right-click the new TCPNoDelay value and select Modify, enter “1? (Hexadecimal radio button should be selected)
  17. Verify that TCPNoDelay now shows up in the property list with typs REG_DWORD and value 0×00000001
  18. Exit regedit and reboot again (reboot is necessary for this to take effect!)
  19. Play a game and enjoy your new low ping.

Credit for the instructions goes to Dustin at LIFE & CODE.

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