you have three different bug check strings namely SYSTEM_SERVICE_EXCEPTION , KMODE_EXCEPTION_NOT_HANDLED and BAD_POOL_HEADER unfortunately none of them name a driver to blame for the crash and the bugcheck code for the most common one
KMODE_EXCEPTION_NOT_HANDLED which is
0x3b would suggest hardware.
the driver
tdx.sys is mentioned as unable to load the symbol and as this is a driver for your broadcom ethernet NIC i would normally suggest checking for updates but in this case your version
tdx.sys fffff880`01811000 fffff880`0182f000 0x0001e000 0x4a5bc16b 13/07/2009 23:21:15
looks like the latest version to me ?
I think it's possible this crashe may actually have been caused by a collision between the ethernet driver
tdx.sys and your third party firewall so I suggest you unninstall Norton by symantec, see below* and install
Link Removed due to 404 Error and use windows firewall for debugging purposes.
the other thing that occurred to me is
did you reset your bios to defaults after installing the new CPU ?
I think it's likely you may have higher power requirements for this CPU so maybe check in the bios what the voltage is set at ?
most importantly you have some old problem drivers on your system
this driver
ASACPI.sys fffff880`043d7000 fffff880`043df000 0x00008000 0x42476c4c 28/03/2005 02:30:36
is very old pre dating windows 7 and needs removing or updating,
ASACPI.sys belongs to the Asus ATK0110 ACPI Utility (14/05/2009 is i think the latest available)
from your latest minidump on the 11th march these drivers need updating or disabling
lvpopf64.sys fffff880`02425000 fffff880`0256fd00 0x0014ad00 0x464502a5 11/05/2007 23:56:21
lvuvc64.sys fffff880`02025000 fffff880`02395500 0x00370500 0x46450350 11/05/2007 23:59:12
LVUSBS64.sys fffff880`0501f000 fffff880`05029900 0x0000a900 0x464503d0 12/05/2007 00:01:20
HCWUSB264.sys fffff880`082fd000 fffff880`0832d400 0x00030400 0x46a64b0f 24/07/2007 18:55:11
PxHlpa64.sys fffff880`0107c000 fffff880`01087d00 0x0000bd00 0x47d88a39 13/03/2008 01:58:17
ctac32k.sys fffff880`04400000 fffff880`044ae000 0x000ae000 0x486b3e7e 02/07/2008 08:38:22
adfs.SYS fffff880`09755000 fffff880`0976d000 0x00018000 0x490f2b4e 03/11/2008 16:48:14
UltraMonUtility.sys fffff880`09d28000 fffff880`09d31000 0x00009000 0x491cd006 14/11/2008 01:10:30
LHidFilt.Sys fffff880`0832e000 fffff880`08341000 0x00013000 0x494b4f5c 19/12/2008 07:38:04
LMouFilt.Sys fffff880`0834e000 fffff880`08362000 0x00014000 0x494b4f61 19/12/2008 07:38:09
L8042Kbd.sys fffff880`03fed000 fffff880`03ffa000 0x0000d000 0x494b4fb2 19/12/2008 07:39:30
theres a few logitech drivers there possibly quick cam ?
for the rest a google search should get some results ...............
*I strongly suggest remove Norton completely by uninstalling then finish the job by using the
removal tool let us know how you get on ?