Windows 7 and the case of the dropped network traffic

So the good news of Windows 7 is that they removed the TCP half-open limits.

The bad news is that quite a fair number of people have problems with their network interface card (NIC) dropping dead on them as soon as they push their system to sustained high throughput, think of leeching newsgroups, using torrents, but also downloading ISOs (BSD or Linux releases) or even watching YouTube clips and downloading a driver.

The suggested ‘fixes’ have been ranging from absurd to interesting.

Things I have done so far:

  • rolled back the driver from NVIDIA to Microsoft’s stock driver, did NOT help
  • disabled power management features, did NOT help
  • disabled autotuninglevel (netsh int tcp set global autotuninglevel=disabled), still in testing

Things to try still:

  • disable all Quality of Service (QoS)¬†stuff
  • disable all offloading (netsh int ip set global taskoffload=disabled)
  • disable Gigabit related features

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