I have a P35c DS3R and the same ram, by default my board boots the ram at 1.8v ,you need to adjust the DDR overvoltage in bios.I have mine at +0.4 (2.2v everest reads it as 2.1v).
present settings
mem 4,4,4,12 @ 824 mhz ,SMM 2.0 , performance enhance ,standard
it will also run stable...