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Plextor M9Pe 512GB & 1TB NVMe PCIe SSD Review (Page 7)

By Jon Coulter from Jan 2, 2018 @ 8:00 CST
TweakTown Rating: 96%Manufacturer: Plextor

Iometer - Maximum IOPS

Version and / or Patch Used: Iometer 2014

We use Iometer to measure high queue depth performance. (No Partition)

Max IOPS Read

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Max IOPS Write

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We test NVMe SSDs using eight threads at QD32, or QD256. We do this because we want to see what the drive can generate at its maximum attainable queue depth. We are falling just short of factory specs with the 1TB model, and are exceeding factory specs with the 512GB model.

Iometer - Disk Response

Version and / or Patch Used: Iometer 2014

We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4K QD1 for both write and read. Each test runs twice for 30 seconds consecutively, with a 5-second ramp-up before each test. We partition the drive/array as a secondary device for this testing.

Avg. Write Response

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Avg. Read Response

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The results of this testing indicate that we are bypassing the drives NitroCache when reading random data, and what we are seeing is the native performance of the drives TLC flash array. Nevertheless, the M9Pe is delivering excellent results.

DiskBench - Transfer Rate

Version and / or Patch Used: 2.6.2.0

We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) composed primarily of incompressible sequential and random data as it's transferred from our Toshiba RD400 1TB NVME SSD to our test drive. We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drive's read transfer rate. Our system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.

Write Transfer Rate

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Read Transfer Rate

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We recently upgraded our test system to Windows 10 build 14393. With that upgrade, write transfer rates almost doubled. The reason for this, as far as we know, is that CPU power switching modes have been relaxed on the latest version of Windows 10. We included the NVMe drives we've tested to date on this build of Windows 10. If you needed a good reason to upgrade to a newer version of Windows 10; this is a good reason.

As expected, we are seeing very good read transfer results and decent write transfer results. In fact, the 512GB model is delivering the second best read results for any SSD we've tested to date. Better channeling is the reason why the 1TB model delivers superior write transfer performance than the 512GB model.

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