Hi, I have one Windows XP andtwoWindows Vista computer, all have a gigabit networkcard installed. I have a HP gigabit switch in between. Cat 5e 350Mhz cables in between. I have installed Service pack 1 on my vista computer and after that set-up my 1 GBit network. When I transfer large files over the network from XP to vista my network troughput has an avarage of 3MB per second. Also when I try transfering files between the the two vista machines I get a very poor performance. After searching the internet I found the microsoft workarround for this issue: enable the offload checksum on your nic. netsh interface tcp set global autotuninglevel=disabledDisable the autotunning feature in Vista completely, and fit and lock the RWIN receive window to default value 65536 bytes. netsh interface tcp set global autotuninglevel=highlyrestricted Allow for the receive window to grow beyond the default value, but do so very conservatively. In this mode, Vista will by default use RWIN of 16,384 bytes with a scale factor of 2. netsh interface tcp set global autotuninglevel=restrictedAllow for the receive window to grow beyond the default value, but limit such growth in some scenarios. netsh interface tcp set global autotuninglevel=normalAllow for the receive window to grow to accommodate almost all scenarios. The default setting in Vista. Specifying this command mean you want to turn back on AutoTuning feature. netsh interface tcp set global autotuninglevel=experimentalAllow for the receive window to grow to accommodate extreme scenarios. Note The experimental value can decrease performance in common scenarios. This value should be used only for research purposes. All these options didn't work. We use this cables in my office for Gbit networkconnections, and we don't experience any problems.... So i am running out of options to get this network faster. Does anyone have some ideas? If Vistanetwork performance stays so slow our customers do not want to make the switch to vista. Best regards, Marcel van Klaveren MCSA 2003

Try turning off remote differential compression through the "Turn Windows Features on or off." Also, is your HP switch managed? If so, is it reporting any crc errors, or is it negotiating at a speed lower than 1 gb? If so, try setting the switch to 1000 Full and the nic to 1000 full, or 100Full on each side.

Hi Graig, Thanks your your answer, but I already disabled that windows option. After that i must say the speed increased with an extra 2 Mbit per second...... the "wow" begins.. ;-)) My switch is a unmanaged switch. All networkcards are set to 1Gbit Full Duplex. BR Marcel

Hello Marcel, Before we move on, may I know the following 1. When the issue first occurred? 2. Did the issue exist before installing Windows Vista Service Pack 1? Please try the instructions below to narrow downs the problem. 1. In the system tray bar, you would see your network connection. Try right clicking on the network connection and press on "Diagnose and Repair". This should clear out some issues. 2. Defrag your hard drive. You would get much more throughput when your drives don't have to seek the information. 3. Make sure you don't have spyware and viruses. 4. Temporarily disable/uninstall all Anti-Virus programs or firewalls. This issue may be related to some types of firewalls; therefore, if you have installed any Anti-Virus programs or firewalls, please temporarily disable/uninstall all the firewalls and Anti-Virus programs, as this may be helpful in resolving this problem. Note: In order to prevent virus attack during this process, please run a complete virus check first. Then you can reinstall the anti-virus software after our troubleshooting steps. 5. Disable Auto-Tuning. You may refer to the following article. Fix for poor network performance in Windows Vista http://elanso.com/ArticleModule/PzJXPKHaQmJXKzUARbSOKAIi.html 6. Check 3rd party application compatibility. The problem may also be caused by some third-party programs or services. I suggest you running Windows in Safe Mode to identify any drivers or programs that may be interfering with the normal operation of your computer. Run Windows Safe Mode ==================== I suggest we restart the computer in Safe Mode to see if the problem also occurs in the mode which loads a minimal protected-mode configuration, disables Windows device drivers and uses the standard VGA display adapter. 1. Detach all unnecessary peripheral devices from your computer, such as printers, scanners and removable storage devices. 2. Restart the computer. 3. Keep pressing the F8 key until the Windows Startup menu appears. 4. Choose Safe Mode with Networking, and press Enter. 5. Test the issue in Safe Mode to see if the issue still exists. Note: In Safe Mode, your system display and Desktop will look and perform differently than in Normal Mode. This is only temporary. If the issue does not occur in safe mode, lets try a Clean Boot to test the issue. Run Windows in Clean Boot mode =========================== The problem may be caused by some third-party programs or services. I suggest you perform a clean boot of your system to identify any drivers or programs that may be interfering with the normal operation of your computer. Note: You must be logged on as an administrator or a member of the Administrators group to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure. 1. Click Start. 2. Type "msconfig" (without the quotation marks) in the Start Search bar and click Enter on the keyboard. 3. Switch to Services tab and then Check Hide All Microsoft Services. 4. Click Disable All. 5. Switch to the Startup tab and then Click Disable all. 6. Click OK. 7. Click Restart to restart the computer. Note: we can go back to normal boot by running msconfig again and check back the items. For detailed step, please refer to the following Microsoft Knowledge Base Article and demo: http://support.microsoft.com/kb/331796 How to troubleshoot a problem by performing a clean boot in Windows Vista http://support.microsoft.com/kb/929135 Feel free to let me know the result! Cheers

Hi, Here are the results: 1: Diagnose changed back the TCP settings that I had changed, 2: Defrag didn't help, I have fast SATA disks. 3: No virusses or spyware 4: Without virusscanner I see minimal changes 5: The command: netsh interface tcp set global autotuning=disabled had the result that the speed increase to 12MB per second.but still thats not enough. 6: Safe mode with network....wow! what a large icons! ;-))unfortunattely this didn't result in higher network speed. It was even lower 1 MB per second. Thanks for your help so far, please let me know if you have any other options. cheers! Marcel

Ow, I forgot to answer the other 2 questions. I have just upgraded my network to 1Gbit, at that time SP1 was already installed on my computer. My other Vista computer has no SP1 installed, the speed the even worse. My Windows XP machine has SP3 installed. So I have this problem from the beginning of my Gbit adventure.

Windows Vista is just painfully slow live with it

Remember that your NIC transfer rate is only part of the equation. Your hard drive has a limited transfer rate + the overhead of Windows when copying. That could be part of the reason why your connection is slower than what you feel it should be. You could well be hitting the limits of the hard drive before any others. Also, depending on the chipset and motherboard design in place, they may not be able to handle anything near gig-e speeds sustained. Make sure you have the very latest drivers for the gigabit network card in question. Some people had the same problem with the Microsoft driver, but as soon as I loaded the correct driver from their vendor's official website the transfer rate shot up to what it should have been before. In addition, you might contact with your gigabit switch provider (HP) to know more details about the hardware device's limitation. Turn both Windows Vista build-in firewalls and third-party anti-virus firewalls off. For your interesting, you might also refer to the following webpage. How to fix slow shared network file transfer on Windows Vista http://www.computing.cc/windows-vista/how-to-fix-slow-shared-network-file-transfer-on-windows-vista/ Interesting thing about slow vista network speed http://forums.2cpu.com/archive/index.php/t-83112.html 1GBps network slow, any thoughts why ? http://forums.whirlpool.net.au/forum-replies-archive.cfm/685638.html

Hi! With these things in the back of my mind I have tested the following. I have borrowed a new laptop and installed Windows XP on it. After that i tried to copy a DVD over the network to my own Vista machine. I must say that the networkload reached the 22%! normally is was stuck on 8%. So I think that we can conclude that my recent computers cannot handle the througput for 1Gbit network. Thanks mR mOOn, You have opened my eyes. I think we can close this thread.