Commenter chartreuse argues that not only is the SAT a valid measure of intelligence, but that it’s even better than official IQ tests.  I wouldn’t go that far, but the SAT is unique in that it’s been used to collect data on millions of test takers.  For that reason, it’s an especially reliable source for documenting racial differences in IQ within America.  One can convert SAT scores on the post-1995 SAT into IQ equivalents using this formula I created:

IQ equivalent (U.S. norms) = 23.835 + 0.081(new SAT score)

One problem is that although the SAT is given to an enormous sample of Americans, it is not given to a representative sample of Americans.  Only about the most academically successful third of American 17-year-olds take the SAT,  however one might crudely adjust for this filtering.

For example, the average white SAT taker has an SAT score of 1068 which equates to an IQ of 110 (U.S. norms); 107 (U.S. white norms).  But we know that the average IQ of all post-boomer Whites is 103 (U.S. white norms); 100 (U.S. white norms).  Thus in the chart below, I just assume that the college bound segment of each race is 7 IQ points higher (U.S. norms) than the general U.S. population for each race:

race	mean sat of college bound seniors	mean iq equivalent of college bound seniors (u.s. norms)	mean iq equivalent of college bound seniors (u.s. white norms)	mean estimated iq in the general u.s. population (u.s. norms)	mean estimated iq in the general u.s. population (u.s. white norms)
asian americans	1091	112	109	105	102
whites	1068	110	107	103	100
american indians	982	103	100	96	93
mexican americans	916	98	95	91	88
puerto ricans	917	98	95	91	88
other hispanics	932	99	96	92	89
african americans	864	94	91	87	83

If anything, the chart above overestimates the general population score gaps between different races, because it assumes a 7 point IQ gap between the SAT population and the general population in every race, but in non-Asian minorities, that gap could be larger because a smaller percentage of those races go to college, and thus the college bound elite are even more filtered for ability.

It should be noted that the relatively small gap between Whites and Asian Americans might be because (1) the SAT does not emphasize spatial ability, and (2) Asian Americans are not equivalent to East Asian Americans, but include non-white caucasoids and southeast Asians who have australoid admixture.