Drop the FSB to 200mhz, raise the multi to 17.5x (3500mhz), raise the vcore to 1.4000v, prime with Prime95 with large FFTs for an hour or two. Make sure your temperature stays under 60C loaded.
If you can't set the ram voltage drop the timings to 5-5-5-15.
If you can't set the ram voltage drop the timings to 5-5-5-15.