How to tune a network card in Windows 7
Hey all, All over the internet one can find the steps to improve windows XP/2003 networking. XP/2003 had these steps: Open the registry editor and drill down to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters Add a registry DWORD named TcpWindowSize, and enter a sufficiently large size. 131400 (make sure you click on 'decimal') should be enough. Tcp1323Opts should be set to 3. This enables both rfc1323 scaling and timestamps. Next increase the TCP buffer sizes: ForwardBufferMemory 80000 NumForwardPackets 60000 I heard these are not valid for windows 7 anymore. Is that true? If they are not valid, what are the new tuning options in Windows 7? I assume that Windows 7 comes tuned for 100 Mb. I would like to tune for 1 Gb.
July 20th, 2010 8:06pm

Windows 7 and Vista include a "new & re-written" TCP stack that aims to take full advantage of hardware advances such as gigabit networking. Among the new features is Receive Window Auto-Tuning Level for TCP connections. TCP AutoTuning enables TCP window scaling by default.
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July 20th, 2010 9:39pm

Hi, Please refer to the following links and see if they are any help to your issue: Heres why TcpWindowSize does not work in Vista Windows 7 and Windows Vista Network Performance Tweaks Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. Hope this helps. Regards, Sabrina
July 22nd, 2010 11:55am

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