Really silly question but something I always wondered about... Back in the days of 386 and 486 I overclocked plenty of CPUs by just changing the oscillator.. I always wondered if that was also possible with network cards back in the day. I think old cards (such as LANtastic compatible cards) had a 20 MHz Oscillators to match their 10 mbps clock speeds. If you replaced this with a 25 MHz oscillator - is it possible it would have worked at the higher data speed? Is there something about the protocol or signalling that would have prevented it from working reliably, assuming the components had enough margin to handle the speed? (Note, I'm assuming you have two PCs connected, and overclock each PC's NIC to the same frequency. I'm also assuming a short enough cable can deal with higher frequencies. Also 16-bit ISA busses have ~ 64 mbps of bandwidth so I don't see a bottleneck there). Thanks! John