![]() ![]() We are moving towards using larger test sizes on our benchmarks, but on several tests, we also used the smaller default test sizes. Activity Monitor shows aggregate disk or network traffic, which would almost always inflate the results.Samsung 980 Pro 500GB Performance Testing However, unlike AJA or BMD’s tools, Activity Monitor can’t be isolated to report results on a single device. For now, however, be careful relying on either of these software tools until we learn more.Īpple’s Activity Monitor can be used to measure data transfer rates. All three said they would look into it and get back to me. Some variation is to be expected, but not this much. The problem is that we don’t know which one is the most accurate.Īs I mentioned at the beginning, I reached out to OWC, AJA and Blackmagic Design to get their interpretation of these results. ![]() Here are the detailed results of my tests.Ĭlearly, there is a significant difference between these two tools – and there shouldn’t be. However, consistency is not the same as accuracy. BMD reported far more consistent speeds than AJA. NOTE: The lower the standard deviation, which is measured in MB/second, the more consistent the speed. NOTE: While the difference between read and write speeds is due to the Thunderblade, the differences in speed measurements are due to the software design.Īnother troubling aspect of these results is that AJA System Test Lite reported a much wider fluctuation in speed measurements – especially in write speeds – than Blackmagic.
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