The default voltage range for the Wolfdale chips is 0.8500V-1.3625V. 1.3625 volts is Intel's recommended max voltage. 1.45 volts is Intel's recommended "do not exceed" voltage. Forget the "nominal + .300 volts".
So, first, restore factory default values. Does your system now boot and run? If not, fix that first.
Now, I'm working from memory here because I retired my eVGA 680i board years ago when eVGA told me that it wasn't going to be Yorkfield compatible. (They were right. It wasn't compatible.)
So, at stock, you have a 333 MHz FSB frequency and a 1333 MHz FSB clock. Take your memory settings off Auto and set the memory clock to Linked or set it to 667 MHz. Set the RAM voltage to whatever the factory recommended values are or run them up to a max of 2.2 volts.
Now you can start increasing the FSB.
I couldn't push my 680i chipset past 442 MHz, even at the cost of really high MCP temps (<85 C).
Use google to find an OC guide for your specific motherboard. Something else you can do is to look for 680i OC guides. The nVidia 700i series is simply a 600i series modified for Yorkfield compatibilty so the same BIOS settings will work.