Typically technical specs are provided to outside parties via nondisclosure agreements. What in particular were you looking for?
All the publicly available chipset technical documents are linked from this page on developer.intel.com. Anything not listed there is likely confidential and only available under NDA.
Programmer's Reference Manuals for the G965 and G35 are found here:
They are on a Linux website, but written generically.
For more complete information about compiler optimizations, see our Optimization Notice.