We also use the Crystal DiskMark utility for a second opinion on throughput. These scores are useful in discovering the theoretical maximum speed that a drive can achieve. But it also returns some useful throughput measurements.īlackMagic offers both a read score and a write score, which we also compare with those of other, similar drives. This utility is typically used to discern whether a given drive has enough throughput to play back specific video formats smoothly. We use the macOS-only BlackMagic Disk Speed Test app from professional media software firm DaVinci to perform this test. Our next test measures a drive's throughput in bits per second. The score is only meaningful relative to other scores. We mention this score in each review and compare it with the scores that other, competing drives received. The PCMark 7 Secondary Storage test results in a proprietary score that is usually in the thousands. These simulated workloads include a Windows Defender virus scan, an image-import task, a video-editing session, and application launches. The Secondary Storage test is trace-based, which means it measures how quickly software commands are performed during everyday workloads to which you might subject your PC. The company's benchmarking apps are used not only by publications like PCMag, but also by drive and PC manufacturers themselves. Our most wide-ranging benchmark is the PCMark 7 Secondary Storage test. We also test on a 2016 MacBook Pro, using the Type-C/Thunderbolt 3 ports, for certain of our tests.
We test external drives using an Intel X299-based testbed equipped with all the trimmings, including a USB 3.1 Gen 2 USB Type-C port.
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