8. Scroll down to Receive Buffers and set the value to 2048. This sets the number of buffers used by the Ethernet driver when copying data to the protocol memory. The NIC itself does not feature any buffer memory, but the received data packets need to be buffered in order to compensate CPU load changes caused by the operating system. Therefore, buffers are allocated in the PC’s RAM. In general, it is recommended to allocate as many receive buffers as possible to reduce the risk of packet resends. This value is often directly in the Advance Parameter list. Other times, this value is under Performance Options. Set this value to the maximum, typically 2048. 9.
Scroll down to Interrupt moderation and make sure it is enabled. Set the Interrupt Moderation Rate to Adaptive. When a packet arrives, the adapter generates an interrupt that allows the driver (CPU) to handle the packet. At greater link speeds, more interrupts are created and CPU usage increases which can result in poorer system performance. When you enable Interrupt Moderation, the interrupt rate is lower resulting in better CPU performance. However, this lower CPU usage can also result in dropped packets. Interrupt Moderation is generally set to Adaptive by default to allow interrupt rates to be set dynamically depending on traffic type and network usage.
If your system is experiencing dropped packets, this value should either be set to Minimal to allow the CPU to handle the packets, or to Extreme to minimize CPU usage. The user will have to experiment with this value because it is PC architecture dependent. Omron Automation Americas 12