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HP EX920 SSD Review - Mainstream Perfection (Page 2)

Chris Ramseyer | Oct 18, 2018 at 10:00 am CDT - 2 mins, 52 secs time to read this page

1TB Class Performance Testing

Product Comparison

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There is a lot to talk about today with three capacities to go over. We start with the 1TB models where the EX920 will go head-to-head with the Adata SX8200 using the same controller and flash. The SX8200 reserves more capacity for background tasks than the EX920 that gives users the full 1024GB of space.

The Intel 600p joins in the fun. This was the go to low cost 1TB SSD for much of 2017 and one of the few entry-level NVMe products to ship in this size. The Plextor M9Pe came to market around the same time. It features 64-layer memory but a first generation Marvell NVMe controller.

The two Samsung 970 SSDs featuring 64L V-NAND and the Phoenix controller, possibly the most advanced ever released for consumer SSDs, don't need an introduction. The EVO uses 3-bit per cell flash and the Pro uses 2-bit per cell flash.

The SanDisk Extreme Pro NVMe is actually the newest of the drives in the charts today. The Extreme Pro features Western Digital's first in-house NVMe controller with the company's 64L TLC.

Sequential Read Performance

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The 1TB HP EX920 starts to read sequential 128KB block size data at over 2,000 MB/s. This is a very high number that is in the same realm as the two Samsung 970 series SSDs. The EX920 scales well as we increase the queue depth (QD) workload. At QD2 the drive is almost as fast as the 970 Pro.

Sequential Write Performance

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Writing sequential data is a bit slower than reading it on the 1TB EX920. The drive turns in a quick performance but its around 1,000 MB/s slower than the two Samsung drives and the SanDisk Extreme Pro NVMe in the burst test.

Sustained Sequential Write Performance

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The sustained write difference compared to the Adata SX8200 with overprovisioning. Adata takes the reserved space to give users more SLC buffer space and the EX920 just gives the space to users to keep data on. Both drives write a lot of data close to 1,500 MB/s in the buffer, but the HP has a higher native TLC speed.

Random Read Performance

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The EX920 has the highest QD1 random read over any flash-based SSD we've tested. The Optane SSDs are faster but use an exotic memory that makes them expensive.

Random Write Performance

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Like the sequential write test, the 1TB EX920 falls below many of the other drives in the random write test. This is less of a concern for users in the SLC buffer age because the drives are all so fast that it's difficult to see the differences in real-world use.

70% Read Sequential Performance

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The EX920's lower sequential write performance doesn't allow the drive to reach the high mixed workload speeds in this test at moderate queue depths, but the drive dominates the QD2 test.

70% Read Random Performance

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The 1TB EX920 also dominates the QD2 random mixed workload test thanks to the drive's blisteringly fast random read performance.

Last updated: Sep 25, 2019 at 12:26 am CDT

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ABOUT THE AUTHOR - Chris Ramseyer

Chris Ramseyer started his career as a LAN Party organizer in Midwest USA. After working with several computer companies he was asked to join the team at The Adrenaline Vault by fellow Midwest LAN Party legend Sean Aikins. After a series of shake ups at AVault, Chris eventually took over as Editor-in-Chief before leaving to start Real World Entertainment. Look for Chris to bring his unique methods of testing Hard Disk Drives, Solid State Drives as well as RAID controller and NAS boxes to TweakTown as he looks to provide an accurate test bed to make your purchasing decisions easier.

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