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Plextor M8Se 256GB & 512GB NVMe PCIe SSD Review

By: Jon Coulter | PCIe in Storage | Posted: Sep 20, 2017 10:15 am
TweakTown Rating: 87%Manufacturer: Plextor

70/30 Mixed Workload Test (Sledgehammer)

 

Version and / or Patch Used: Iometer 2014

 

Heavy Workload Model

 

This test hammers a drive so hard we've dubbed it "Sledgehammer." Our 70/30 Mixed Workload test is designed to simulate a heavy-duty enthusiast/workstation steady-state environment. We feel that a mix of 70% read/30% write, full random 4K transfers best represents this type of user environment. Our test allows us to see the drive enter into and reach a steady state as the test progresses.

 

Phase one of the test preconditions the drive for 1 hour with 128K sequential writes at QD32. Phase two of the test runs a 70% read/30% write at QD32, full random 4K transfer workload on the drive for 1 hour. We log and chart (phase two) IOPS data at 5-second intervals for 1 hour (720 data points). 60 data points = 5 minutes.

 

plextor-m8se-256gb-512gb-nvme-pcie-ssd-review_71

 

What we like about this test is that it reflects reality. Everything lines up, as it should. Consumer drives don't outperform Enterprise-Class SSDs that were designed for enterprise workloads. Consumer drives based on old technology are not outperforming modern Performance-Class SSDs, etc.

 

We were expecting to see wild variability coming from a TLC flash array, but the Eldora controller keeps things nice and tight. The M8Se would greatly benefit from some OP when running heavy sustained workloads. However, we doubt that someone that actually does run heavy sustained workloads would buy an M8Se in the first place. For those types of workloads, Plextor's M8Pe fits the bill nicely. The 512GB M8Se delivers similar performance to OCZ's 256GB RD400, the 256GB M8Se similar performance to the Samsung 960 EVO 250GB.

 

 

 

Sustained Sequential Write

 

Version and / or Patch Used: Iometer 2014

 

Heavy Workload Model

 

We write to the drive for 1 hour with 128K sequential writes at QD32. We log and chart megabytes per second data at 5-second intervals for 1 hour (720 data points). 60 data points = 5 minutes.

 

plextor-m8se-256gb-512gb-nvme-pcie-ssd-review_72

 

This test unmasks sequential write performance of TLC flash arrays. The 512GB M8Se sustains writes at 507 MB/s, the 256GB model 304 MB/s. Although relatively low, it is certainly better than we are getting from Intel's 600p. Samsung's 250GB 960 EVO gets similarly pummeled by this test.

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