Hi jbird5150,
Thank you for the reply. The setting in the advance setting can be varied depends on different network environment, what you can try is to tweak the setting pertains to performance option e.g. Performance options - Receive descriptors or Receive buffers or the Transmit descriptor..
The version that you downloaded is PROSet version 20.1 (which refers to the software version), the driver available for your 82579LM ethernet controller is still version 12.10.29.0. As this is a onboard NIC on HP 8460P, I would recommend you to contact HP for customized driver specifically your ethernet controller on HP system. .
Thanks,
wb