The following graph is showing the results of the RAW ethernet measurements for each of the different hardware configurations.
Looking at SMC/ 3com and 3com/ 3com performance the results are as expected. The time required for one roundtrip is increasing almost linearly, when the amount of user data is increasing. However, the results which were produced by the Intel NIC were unexpected. Although the Intel NIC was very slow when it came to sending packets containing 50 up tp 600 octets of user data, it was outperforming the other two, when the amount of data in a packet is increasing. A possible explanation might be that the driver or the hardware is somehow optimized for larger packages. However this behaviour is not reflected in the UDP comparison graph above.