Coding Horror: Gigabit Ethernet and Back of the Envelope Calculations: "But even before that, I started with a loopback test:

C:\Program Files\ttcp>pcattcp -t -f M localhost

PCAUSA Test TCP Utility V2.01.01.08
TCP Transmit Test
Transmit : TCP -> 127.0.0.1:5001
Buffer Size : 8192; Alignment: 16384/0
TCP_NODELAY : DISABLED (0)
Connect : Connected to 127.0.0.1:5001
Send Mode : Send Pattern; Number of Buffers: 2048
Statistics : TCP -> 127.0.0.1:5001
16777216 bytes in 0.17 real seconds = 93.02 MB/sec +++
numCalls: 2048; msec/call: 0.09; calls/sec: 11906.98"