I took my SAT a lifetime ago and I do not know what you're
talking about if you're actually referring to SAT I. In my time,
SAT I comprised of just the verbal and maths sections (800 for
each, giving a total of 1600).
If it's SAT II you're talking about, then there were various
subjects to choose from and each subject was graded on a 200-800
scale(if my memory hasn't failed me) and most top US colleges
require at least 3 SAT II's(for certain majors, they would indicate
what subjects you should offer for SAT II), in addition to SAT
I.
I can't give any advice if you're not considering US
colleges...