ADATA Premier SP550 

Released August, 2015
  • 960 GB
  • 2.5" SATA III

It is also faster (sometimes substantially) than the MX100 and 840 EVO in light to medium workloads, which have been my recommended value drives.
by Kristian-Vättö (Jun, 2014)
After the torture I TRIM'ed the drive (quick format in Windows 7/8) and ran HD Tach to make sure TRIM is functional.
by Kristian-Vättö (Jun, 2014)

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It is not horrible but I would still rather see consistent behavior instead of a "clean later" approach where the drive pushes maximum IOPS whenever it can.
However, the 128KB write operation completed at 25.6KB/s, whereas the throughput of the 4KB write operation was only 4KB/s..

Specifications Full list of technical specs


Capacity 960 GB
Interface SATA III
Interface speed 6 Gbit/s
Controller -

manufacturer performance

MTBF 1,500,000 hours

form factor

Form factor 2.5"
Weight 68 g
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