i have a tyan s7025 with two xeon 5520 . i installed win 7 x64 ultimate and win 8 pro x64 .
with win 7 if i use the command : netsh int tcp show global then the result is :
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Windows\system32>netsh int tcp show global
Querying active state...
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : enabled
NetDMA State : enabled
Direct Cache Acess (DCA) : enabled
Receive Window Auto-Tuning Level : normal
Add-On Congestion Control Provider : ctcp
ECN Capability : disabled
RFC 1323 Timestamps : disabled
while with with 8 on the same mainboard with drivers being latest too , i get :
Microsoft Windows [Version 6.2.9200]
(c) 2012 Microsoft Corporation. All rights reserved.
C:\Windows\system32>netsh int tcp show global
Querying active state...
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : disabled
NetDMA State : disabled
Direct Cache Access (DCA) : disabled
Receive Window Auto-Tuning Level : normal
Add-On Congestion Control Provider : none
ECN Capability : disabled
RFC 1323 Timestamps : disabled
Initial RTO : 3000
Receive Segment Coalescing State : disabled
despite i added in registry some new keys :
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
EnableDCA=1 and EnableTCPA=1
they have no effect even many reboot ... while my settings in win 7 were done without anything in the registry except using tcpoptimizer from speed guide
what should i do ?
i also be glad if someone gives a link to a wiki about the registry keys for tcip and the different windows releases, even something [improbable] knowing all the keys of all the windows...