Okay to start I am not a noobie when it comes to PC hardware... but I am seriously having a problem I cannot seem to fix no matter what i do.. It happens with many PC's I own.. The current one is a VISTA BOX Okay to start I have the problem of VERY Slow SPEED for file transfer accross a network.. usually transfering at a rate of 60-200KB/sec @ 100MB Full Duplex file transfer to Vista box is about 60KB/Sec-700KB/sec going fast slow etc.. @ 10MB Full/Half Duplex the transfer is 1.2MB/SEC constant! very fast compared to what I get with 100MB... heres the thing when I send a large file VISTA BOX --> SERVER at any speed it goes at the fastest possible speed! 10MB = 1.2MB/sec | 100MB = 9.8MB/sec also if I transfer the file from the SERVER or my system to the VISTA BOX is transfer at about 3.5-8MB/sec but my system is very busy! I've tried different Switches, my main Switch is a 3COM 8port gigabit switch model 3C1670800A I've tried the SERVER & the VISTA Box in my Internet's Router 4 port'ed switch same problem keeps happening I Have also checked cables and changed many cables to test things. I do not have a domain, and my usual network setup is to use static Ip's for each box.. eg: 192.168.0.1, 192.168.0.2, 192.168.0.33 etc... I have had problems with mainly onboard NICs, and usually fixed by Buying a PCI NIC but I got a new NIC today and same f'en problem. Computers I've usually and always had problems with N-Force 2 Asus A7N8X-X with AMD MP 2800+ and a ASrock 775i65GV cheapo mobo 2.66GHZ Pentium 4 775 My other Pc's that are working 100% absolutly no problems in my Network are following PCs.. 1. Core2 E6400 with a Gigabyte DQ6 high end MOBO 2. AMD 3800X2 with a DFI lanparty NF4 sli high end mobo 3. SERVER = 8KNXP with a 2.4G Pentium4 4. HTPC 1 = Pentium4 3ghz and Gigabyte mobo unknown model forget!! 5. HTPC 2 = Pentium4 3GHZ and a Gigabyte mobo unknown model so thats 7 PC's connected and only 1 of them with a problem.. My work had a problem but I fixed that with adding a new PCI N/W card. any ideas of what I can do to fix this issue?