Comment Multiple software produces the best result (Score 2, Informative) 215
The only thing I can say is a lot of benchmarking software that offers charts and nice graphs tend to be skewed. Not all of them however. A lot of hardware companies design the parts to get somewhat abnormally high results on benchmarks, thus inflating the numbers, and providing inaccurate results.
Your best bet is unfortunately more time consuming. You should have multiple software testing the machine, and then make your own chart. This is much more accurate. Try rendering a 1080p video file and record the amount of time it takes. Things like that.