There are no cut off marks, but most accepted applicants tend to have scores in the high 600s-800 unless you have definite reasons for scoring less or can prove your academic ability in other ways.
I think closer to 700-800 =P I have 780/720 Lit/Bio and 800/740 SAT V/M I don't think my scores are competitive enough for Harvard/Yale... At least looking at collegeconfidential