I, myself have an Ariadne II network card.
It's using Realtek's RTL8019AS chip which has an ISA bus interface.
I use smbfs to access my server. i did some performance tests with SysSpeed to see what transfer speed I could get with different configurations.
What I found out was that how much I did overclock the system maximum transfer rate seemed to be the following.
Write: 230 kbyte/s
Read: 690 kbyte/s
Apparently this seems to be more a limitation of smbfs than the network card since tcpspeed still gets a performance boost. (Maybe something with interrupt timings!?)
Oh, by the way I succeded to improve the the benchmark values for opening files by replacing the 25MHz oscillator on the Ariadne II board with a 50Mhz variant. This didn't increase the heat on the board. (I expected that the Realtek chip could operate beyond it's specs without problem and it did)
