Boot after each step.
1. If you haven't already, try both sticks, one at a time, in more than one slot.
2. Remove all additional peripherals plugged into the rear I/O e.g., printers USB etc.
3. Remove all drives CD/DVD and HD except the boot drive.
4. Remove boot HD.
5. Remove all mobo Header connections e.g., sound, USB, firewire, eSata.
6. Remove 9600GT and enable onboard video.
This should allow you to determine if any of the components are causing the hang.