The Western Digital WD Black SN750 SSD Review: Why Fix What Isn't Broken?by Billy Tallis on January 18, 2019 8:01 AM EST
AnandTech Storage Bench - The Destroyer
The Destroyer is an extremely long test replicating the access patterns of very IO-intensive desktop usage. A detailed breakdown can be found in this article. Like real-world usage, the drives do get the occasional break that allows for some background garbage collection and flushing caches, but those idle times are limited to 25ms so that it doesn't take all week to run the test. These AnandTech Storage Bench (ATSB) tests do not involve running the actual applications that generated the workloads, so the scores are relatively insensitive to changes in CPU performance and RAM from our new testbed, but the jump to a newer version of Windows and the newer storage drivers can have an impact.
We quantify performance on this test by reporting the drive's average data throughput, the average latency of the I/O operations, and the total energy used by the drive over the course of the test.
The WD Black SN750 improves slightly over its predecessor on The Destroyer, setting a new record for the highest average data rate from a TLC-based SSD.
The SN750 has slightly lower average latency on The Destroyer than its predecessor, but the Phison E12-based Corsair MP510 is in the lead among flash-based SSDs. The MP510 and both the current and previous WD Black are essentially tied for 99th percentile latency.
The SN750 improves on both average read and write latency scores, but the Corsair MP510 has a much better average write latency on The Destroyer than the WD Black or even the Intel Optane 900P.
The 99th percentile read and write latency scores for the SN750 are essentially unchanged from the previous WD Black, leaving it with one of the best QoS scores for reads but a score for writes that is worse than several of last year's TLC-based competitors.
The total energy consumption of the new WD Black over the course of The Destroyer is about 4% lower than its predecessor, further increasing WD's lead in NVMe power efficiency.