Samsung SSD 850 EVO mSATA Review


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AIDA64 Disk Benchmark

Many enthusiasts are familiar with the Finalwire AIDA64 benchmark suite (formerly Lavalys EVEREST), but very few are aware of the Disk Benchmark tool available inside the program. The AIDA64 Disk Benchmark performs linear read and write bandwidth tests on each drive, and can be configured to use file chunk sizes up to 1MB (which speeds up testing and minimizes jitter in the waveform). Because of the full sector-by-sector nature of linear testing, Benchmark Reviews endorses this method for testing SSD products, as detailed in our Solid State Drive Benchmark Performance Testing article. However, Hard Disk Drive products suffer a lower average bandwidth as the capacity draws linear read/write speed down into the inner-portion of the disk platter. AIDA64 Disk Benchmark does not require a partition to be present for testing, so all of our benchmarks are completed prior to drive formatting.

Linear disk benchmarks are superior bandwidth speed tools in my opinion, because they scan from the first physical sector to the last. A side affect of many linear write-performance test tools is that the data is erased as it writes to every sector on the drive. Normally this isn’t an issue, but it has been shown that partition table alignment will occasionally play a role in overall SSD performance (HDDs don’t suffer this problem).


250GB Samsung SSD 850 EVO mSATA Read Results

The high-performance storage products tested with Lavalys AIDA64 Disk Benchmark are connected to the Intel P67-Express SATA 6Gb/s controller and use a 1MB block size option. Charted above, read performance on the 250GB Samsung SSD 850 EVO mSATA solid state drive measured average speeds of 522.1 MB/s. As evidenced by the wave form, the average read speed was virtually identical to this drives maximum peak speeds of 527.4 MB/s across the full range of capacity. AIDA64 linear write-to tests were next…


250GB Samsung SSD 850 EVO mSATA Write Results

The waveform chart above illustrates how well the Samsung SSD 850 EVO mSATA manages file transfers, indicating linear write performance speeds that appear uninterrupted. The 250GB Samsung SSD 850 EVO mSATA solid state drive recorded an average linear write-to speed of 292.5 MB/s, appearing to throttle down to SATA 3.0 Gb/s speeds after an initial burst of maximum performance reaching 487.0 MB/s.

AIDA64 combined benchmark speed performance results for the 250GB Samsung SSD 850 EVO mSATA surpassed every other SATA-based SSD we’ve tested, firmly outperforming the Intel SSD 520 series and nudging past the 256GB Samsung SSD 850 PRO.

The chart below shows the average linear read and write bandwidth speeds for a cross-section of storage devices tested with EVEREST:


Linear tests are an important tool for comparing bandwidth speed between storage products – although HDD products suffer performance degradation over the span of their areal storage capacity. Linear bandwidth certainly benefits the Solid State Drive, since there’s very little fluctuation in transfer speed. This is because Hard Disk Drive products decline in performance as the spindle reaches the inner-most sectors on the magnetic platter, away from the fast outer edge.

In the next section we use PCMark Vantage to test real-world performance…


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1 comment

  1. Athlonite

    I would have liked to have seen a seperate IOP’s test that shows the read and write iops and if they were anywhere near the stated values for the SSD , combined values of 50/50 is not a normal scenario for everyday use it would be more like 80R/20W …..

    Other than that very nice review Olin thank you

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