MacsWork said:
3mbps(full speed) = 300k
Full speed is not always going to happen.
Lets assume there are 3 computers
300k ÷ 3 computers = 100k per (full speed downloading)
Try using one mac connected to the modem only and go to,..
www.bandwidthplace.com/speedtest
see what the results are and post them.
Bandwidth over the internet isn't what he was specifically concerned about, but rather speed between the computers, which (for the benefit of others) thru the Airport would be 54mbps (Extreme, regular (older) base station is 11mbps) via wireless and 100mbps via LAN.
the transfer rate between computers in the house is horrid
Are you using all computers wirelessly? Or do you have one or more on the LAN side of the base station?
If wireless, what base station are you using, Extreme or the original base station?
If using the original base station, this could be as good as it gets between computers.
Make sure the firmware is updated on all computers and the base station itself, this may help.
Also what OS version are you using? 10.3, 10.4?
AND, finally, how far apart are the computers, and base station?