if you leave the settings on default ...as set by the bios you will get better. you can drop the mem power until it fails to save some power mine sits at 980...also -10% power limit helps save some more.
you should get 31.5 but watch the temps, you appear to be missing the -tt 75 setting in your config, as long as you have v6.0 + you will now get temp and fan control on claymores.
boysie