I've set up ftp server on my Windows 7 Box (Filezilla). Download speed from this server to Windows 98 machine (Pentium 3 550Mhz, 3Com SOHO NIC, Total Commander ftp client) is about 7MB/s.
Is DMA transfer for HDD turned on ? I've noticed big differences in transfer after turning on DMA.
1) VLSI SCAMP /286@20 /4M /CL-GD5422 /CMI8330
2) i420EX /486DX33 /16M /TGUI9440 /GUS+ALS100+MT32PI
3) i430FX /K6-2@400 /64M /Rage Pro PCI /ES1370+YMF718
4) i440BX /P!!!750 /256M /MX440 /SBLive!
5) iB75 /3470s /4G /HD7750 /HDA