HDTune tests a similar level of features that HDTach does, but with a slightly different access pattern and thus can provide us with an additional set of benchmark numbers to compare between storage configurations. Here we can get the minimum, maximum and average transfer rates as well as the burst rates and access times. CPU utilization has proven negligible with modern processing horsepower, and is no longer included.
Much like HDTach, HDTune's burst test gives very inconsistent results. Posted here for information only – the results don't have significant meaning.
The output graph from HDTune was one of the most consistent I'd ever seen. It was as perfect of a flat line as possible, from the beginning to the very end of the 840 Pro. Consistency aside, the average figure is most important, and the 840 Pro takes the crown.