The IQ test is almost worthless when measuring intelligence above iq 70. It was designed to asses retardation. That´s pretty much all it´s good for. So said it´s creator Binet, and so says all the people who have studied it as well. The urge to use the test to measure high intelligence is a political choice. Not a scientific one. 
http://en.wikipedia.org/wiki/Intelligence_quotient
We have no way of measuring high intelligence. We can´t even define it. 
We also haven´t really defined the difference between human races in a meaningful way. Skin colour is only one aspect of regional differences between humans. We´re still not quite sure how epigentics work. 
There´s just way too many vague factors to make any kind of race/intelligence assessment meaningful.
		
 
		
	 
Yes, Binet designed the first intelligence test to identify children liable to fall behind in school. Gould suggests that this should remain the ONLY use of the IQ test, but I suggest you be careful of the genetic fallacy (origins have central relevance to everything that came afterward). Intelligence score variations all along the spectrum show very relevant correlations. For examples, they have an 80% correlation to variations in educational attainment, 50% correlation to variations in economic earnings, 60% correlation to genetic variations, and 40% correlation to brain size variations. Remember, we are not even talking about races here. Whatever the causes of some or all of these correlations may be (genetic or environmental), they have (or ought to have) central relevance in our understanding of human society as a whole.
The article "
Mainstream Science on Intelligence" provides a non-technical but widely-accepted and useful definition and description of intelligence:
1. Intelligence is a very general mental capability that, among other things, involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly and learn from experience. It is not merely book learning, a narrow academic skill, or test-taking smarts. Rather, it reflects a broader and deeper capability for comprehending our surroundings--"catching on," "making sense" of things, or "figuring out" what to do.
2. Intelligence, so defined, can be measured, and intelligence tests measure it well. They are among the most accurate (in technical terms, reliable and valid) of all psychological tests and assessments. They do not measure creativity, character personality, or other important differences among individuals, nor are they intended to.
3. While there are different types of intelligence tests, they all measure the same intelligence. Some use words or numbers and require specific cultural knowledge (like vocabulary). Others do not, and instead use shapes or designs and require knowledge of only simple, universal concepts (many/few, open/closed, up/down).