The 99th percentile latency scores are much higher for the full-drive test runs, but it's not an egregious outlier like a few of the other entry-level NVMe drives. When the test is run on a full drive, the SSD 980's performance drops considerably, and it ends up on par with the WD Blue SN550. Performance when running the test on an empty drive is now competitive with mainstream TLC NVMe drives, including the latency scores. Moving on to the Heavy test, the Samsung SSD 980 improves its standings considerably. We run this test twice: first on a mostly-empty drive, and again on a completely full drive to show the worst-case performance.
The ATSB Heavy test is much shorter overall than The Destroyer, but is still fairly write-intensive. But Samsung's performance-oriented NVMe drives have long been notable for their high energy consumption, and the SSD 980's results are nothing special in the context of other competitors on the market. The SSD 980 does use less energy to complete The Destroyer than the 970 EVO Plus or 980 PRO did: slower and lower power worked out to lower overall energy consumption. The 500 GB 980 struggles compared to the 1 TB model, but still pulls off an overall average data rate that's better than the 1TB SATA 870 EVO. In particular, Samsung's latency scores are quite a bit higher, especially for write operations. The Samsung SSD 980 turns in decent overall scores for an entry-level drive on The Destroyer, but it doesn't quite match the performance of the WD Blue SN550. For more details, please see the overview of our 2021 Consumer SSD Benchmark Suite. The Destroyer is the longest and most difficult phase of our consumer SSD test suite. Our AnandTech Storage Bench tests are traces (recordings) of real-world IO patterns that are replayed onto the drives under test.
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