Leatrix Latency Fix

What does it do?

Leatrix Latency Fix will reduce your World of Warcraft latency significantly by increasing the frequency of TCP acknowledgements sent to the game server. For the technically minded, this is a script which will modify TCPAckFrequency.

You will also see reduced latency in other online games such as Aion, Warhammer and Lord of the Rings. The average reduction in latency (based on feedback from comments) is 66%. Click the Change Log tab above to see a summary of player feedback.

System Requirements

Leatrix Latency Fix is supported on these operating systems only.

* Windows XP (SP2 or higher)

* Windows Vista (SP1 or higher)

* Windows 7

Both 32-bit and 64-bit versions of Windows are supported.

Macintosh users should read the relevant section in the FAQ below.

Installation Instructions

In the download, you'll find 3 script files - Install, Remove and Checker. Simply run the Install script and follow the prompts .

If you're logged into your computer with an account which doesn't have Administator privileges (or you're using Windows Vista or Windows 7 with User Account Control enabled), you'll be prompted to enter the credentials of a user account which has Administrator privileges .

After the installation, you should see a confirmation window . Simply do what it says and restart your computer. If you don't see a confirmation window, or have any other problems with any of the scripts, read the FAQ below.

Once you've restarted your computer, you can login to Wow with reduced latency!

If you want to be sure that Leatrix Latency Fix is installed at any time, run the Checker script and it'll tell you . To uninstall Leatrix Latency Fix, run the Remove script.

I recommend that you read this entire page to better understand the process and hopefully any questions you may have will be answered in the FAQ.

How It Works

Wow uses the TCP protocol which requires that network segments sent to your computer be acknowledged in order to provide a reliable connection.

Windows bundles these acknowledgements together and sends them in pairs. While this is an efficient way of dealing with them generally, the inevitable delays caused by the bundling process increase latency considerably.

This is because when Windows queues up an acknowledgement in order to bundle it with the following one, the game server has to wait for the acknowledgement timer to expire before sending new data.

Leatrix Latency Fix removes the acknowledgement bundling process so that an acknowledgement is sent immediately for every segment that's received. This produces a significant reduction in latency as there is no longer a delay before new data is sent to your computer.

In a normal networking environment, you would prioritise network efficiency over latency and use the Windows defaults, but in Wow the opposite is true and you want the lowest latency you can possibly get.