Fixing game lag

TCPAckFrequency “uses delayed acknowledgments to reduce the number of packets that are sent on the media”.  Instead of sending an acknowledgment each time, acknowledgments are delayed.

TCPNoDelay determines whether nagling is enabled or disabled. Nagling “is a feature that combines several packets into a single, larger packet for more efficient transmissions”.

This reduces the overall load on the network to optimize network traffic. The drawback is that latency may increase because of it. If you are using your PC mostly for gaming, or experiencing issues with lag in games, then you may want to see if turning off those features improves gaming latency on your end.
Fixing game lag

You need to make two changes to your Windows Registry.

    Use Windows-R to bring up the run box on the system.
    Type in regedit here and tap on the enter key
    Navigate to the following Registry key here using the tree-like structure on the left: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters\Interfaces
    Here you need to go through the list of sub-keys to locate the network adapter entry that is used to connect to the Internet. If you are using DHCP, you need to look for DhcpIPAdddress here to find the correct adapter, otherwise you need to look for IPAddress here.
    Most of the entries did not contain any useful data on a test system, so that finding the right one should be relatively easy.
    If you do not know your local IP address do the following to find it out: Use Windows-R to bring up the runbox, type in cmd and hit enter. Here you then need to enter ipconfig to display the IP address.
    Once you have located the correct key right-click it and select New > Dword (32-bit) Value.
    Name it TcpAckFrequency and click ok.
    Double-click the value afterwards and set its value to 1. (To restore the default setting, change the value to 2 or delete the key)
    Right-click on the key again and select New > Dword (32-bit) Value.
    Name the new parameter TCPNoDelay
    Double-click it afterwards and change its value to 1. (To restore the key at a later point in time change it to 0 or delete the key)