Flow Control: Helps increase the efficiency of traffic regulation for connections that both support flow control frames. These frames are sent by an adapter when their receive queues reach a predefined limit, to signal the sending station to pause transmission so the adapter does not drop the packets. The implementation of Flow Control (Rx & Tx) in some Network Adapters is known to be buggy, likely at the driver level (Realtek Gigabit adapters confirmed). Flow control does not work well with QoS, and is generally not recommended. Disabling this feature can help reduce timeouts and improve throughput.