|If possible, lower the RAM speed to 533MHz, if not, lower it to 667MHz.|
Lock the PCIe at 100MHz.
Disable any/all Spread Spectrum settings.
Disable Speedstep (EIST).
Begin increasing the CPU frequency a little at a time....210MHz, 215MHz, 220MHz, 225MHz, etc. Boot into Windows after each change & test for stability, if all is well, go back & raise the CPU frequency another step, then test for stability again. Continue until you develop a problem. At that point you have the choice of adding more CPU voltage or just backing off to the last stable setting.
Use OCCT to stress test the system: