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ADATA Premier SP550 SSD Review

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ATTO Disk Benchmark

The ATTO Disk Benchmark program is free, and offers a comprehensive set of test variables to work with. In terms of disk performance, it measures interface transfer rates at various intervals for a user-specified length and then reports read and write speeds for these spot-tests. There are some minor improvements made to the 2.46 version of the program that allow for test lengths up to 2GB, but all of our benchmarks are conducted with 256MB total length. ATTO Disk Benchmark requires that an active partition be set on the drive being tested. Please consider the results displayed by this benchmark to be basic bandwidth speed performance indicators.

ADATA SP550 240GB ATTO

240GB Premier SP550 SSD ATTO Benchmark Results

The 240GB model provided to Benchmark Reviews for testing produced 563 MBps maximum read speeds that plateau when the file size reaches about 256KB, and 510 MBps peak write bandwidth that plateaus starting at 64KB. Both of these numbers match or slightly exceed ADATA’s specs for this drive on this benchmark, which are 560MB/s for reads and 510MB/s for writes. Both of these numbers are very, very good, bumping up against the limits of the available SATA bandwidth and within spitting distance of the fastest drives Benchmark Reviews has ever tested.

ATTO-Disk-Benchmark_Results

In the next section, Benchmark Reviews tests sequential performance using the CrystalDiskMark 3.0 software tool…


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4 comments

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  1. HERETIC

    RE.That’s the data being written to the drive’s 256MB of cache RAM.P8

    I think it’s about 3GB of flash the drive is using in SLC mode…….

    1. GraphsDontLie

      Graphs tell the tale. Look at the spike, well over 1% of the run is fast until it tails off. No way 256MB cache (abit more than 0.1% of the capacity of the drive) accelerated writes for over 1% of the time.

      And if that is an SLC cache, then ALL the writes go through that little bit of SLC…seems like an early failure waiting to happen once the SLC goes.

  2. Master Chen

    Actually, there’s also a 960GB model of SP550 available out there, but it’s quite rare and usually can be found only on Asian market. But still, just take a note.

    1. Olin Coles

      Good information. The 960GB model might not have existed two months ago, when this article (and the product) originally launched.

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