Further info:

# inteltool

Intel CPU: Family 6, Model f
Intel Northbridge: 8086:2a00 (PM965)
Intel Southbridge: 8086:2815 (ICH8-M)


# dmidecode

# dmidecode 2.9
SMBIOS 2.4 present.
45 structures occupying 1977 bytes.
Table at 0x000F7190.

inetltool recognizes Northbridge as PM965 but lspci says GM965.  I am not sure which one it is.

I am not sure if is helpful, but the data sheet for Intel 965 Express Chipset Family can be found at:
http://www.intel.com/design/chipsets/datashts/313053.htm

If you need any more information about my system, please let me know.