I seem to get the impossible ones. I've just bought an NF7/S-based\nmachine. This currently has the on-board nic, plus a £5 wonder nic I\nbought as a spare, and I've been looking at network speeds. The\nserver is a Duron800/win98se, and no slouch as a file server (although\nI see the same problems with another slower server); connections are\nvia a cheapish 100Mb switch (surecom ep808ax). I've timed various\ncopy operations from the server to the nf7 machine.\n\nFor large files, there's no problem. A 200Mbyte video file is read in\nabout 55 seconds (that's around 35Mbit/s) using either nic .\n\nHowever, it's a different story copying a tree of smaller files (the\nperl installation directory as it happens, about 45Mbytes of small to\nmiddling files). Using the cheap nic card, this is read in about 80\nseconds; around 10 to 20Mbit/s. But using the nf7 builtin nic, the\nrate is disastrously low - it took around 3 minutes to copy less than\nhalf the files, at which point I gave up - the data rate was around 1\nto 2 Mbit/s.\n\nThe crazy part is that *dropping* the nf7 nic speed to 10Mb\n*increases* the transfer speed - the 'perl transfer' took just 130sec\n(at about 5Mbit/s, which is close to saturating a 10Mb link.).\n\nI've played around a lot with tcp and udp client/server programs to\ntry to reproduce the problem at the lower level, but cannot reproduce\nthe slowdown at all.\n\nI'm at a loss to tell whether this is hardware or software. I see no\nreason xp should behave differently between the two nic's; yet the nf7\ninterface is fine for large files. Maybe xp doesn't like 98? - but\nthen why the speedup at 10Mb?\n\nI'm at a loss now - having bought the machine over the net, it's a\nnon-trivial task to ship it back for further testing; and not clear\nthat that would even be productive.\n\nHelp, please!!!!!