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Samsung 970 EVO 2TB M.2 NVMe PCIe SSD Review

By Jon Coulter from Jun 20, 2018 @ 10:00 CDT
TweakTown Rating: 95%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-2tb-2-nvme-pcie-ssd-review_51

 

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.

 

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. OP plays a key role in the amount of time it takes for a drive to descend into a steady-state. This is where the 2TB 970 EVO has the advantage over the 1TB model and why its average is so much better.

 

 

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-2tb-2-nvme-pcie-ssd-review_52

 

The 2TB 970 EVO delivers the same sustained sequential write performance as the 1TB model. 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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