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OCZ RD400 PCIe NVMe SSD Review

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AIDA64 Disk Benchmark

Many enthusiasts are familiar with the Finalwire AIDA64 benchmark suite, 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. One of the advantages SSDs have over traditional spinning-platter hard disks is much more consistent bandwidth: hard disk bandwidth drops off 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 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).

Toshiba RD400 linear read tdriver

512GB RVD400-M22280-512G-A SSD Read Results

As shown above, average read performance was just under 2GB/s, although you can see there’s an odd initial “ramp up” at the start of the test, and a variance of a couple of hundred megabytes per second on average.

AIDA64 linear write-to tests were next…

Toshiba RD400 linear write tdriver

512GB OCZ RD400 SSD Write Results

Write performance is more even overall than read performance on this benchmark, with less average “jitter”. A score of 1.4GB/s is very good.

The chart below shows the average linear read and write bandwidth speeds for a cross-section of storage devices tested with AIDA64. The Toshiba OCZ RD400 again edges out the Samsung 950 Pro for top marks in this benchmark. In this benchmark the use of the Windows driver provides noticeably better linear read performance.

OCZ RD400 AIDA

Linear tests are an important tool for comparing bandwidth speed between storage products, serve to highlight the consistent-bandwidth advantages of SSDs, which don’t suffer the performance drop-off that HDDs do as the test proceeds away from the fast outer edge of the disk.

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


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2 comments

  1. AMT

    Could we get a test comparison to load certain games, like load times comparisons to sata ssd?
    example, Star Citizen can have some pretty long load times with SATA SSD, would be nice to know if these drives help out much in these situations etc.

    1. Olin Coles

      While the storage device certainly has a lot to do with load time, the speed and architecture of RAM and CPU are also heavily involved. It would be disingenuous to compare one to another unless the user has the exact same system that we use for testing, which is very unlikely.

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