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Samsung 970 EVO 1TB M.2 NVMe PCIe SSD Review (Page 9)

By Jon Coulter from Apr 24, 2018 @ 9:00 CDT
TweakTown Rating: 99%Manufacturer: Samsung

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.

samsung-970-evo-1tb-2-nvme-pcie-ssd-review_50

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.

Here again, the 970 EVO proves itself to be the best performing TLC SSD when running heavy workloads. Almost 50% better than its main competitor from Western Digital. And, the 970 EVO is giving us what we want to see - tight, consistent and predictable performance. The EVO Series are the only consumer TLC SSDs that deliver tight consistency when running this test.

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.

samsung-970-evo-1tb-2-nvme-pcie-ssd-review_51

1,325 MB/s sustained sequential write is really good for a TLC SSD. It's better than Samsung's factory spec of 1,200 MB/s after TurboWrite. The write-centric SanDisk Extreme Pro does a bit better and thus retains the sustained sequential write crown for consumer TLC SSDs.

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