CSS SQL Server Engineers : TCP Offloading again?!:
http://blogs.msdn.com/psssql/archive/2010/02/21/tcp-offloading-again.aspx
Read this blog post and it reminded me of how you can check to see if Chimney offload is loaded
(it’s a good blog post to see how an Engineer debugs a sticky issue)
And then you can shut ’em off
netsh interface tcp set global autotuning=disabled
netsh interface tcp set global chimney=disabled
netsh interface tcp set global rss=disabled