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Samsung 850 EVO 4TB SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: Sep 26, 2016 1:00 pm
TweakTown Rating: 99%Manufacturer: Samsung

Iometer - Maximum IOPS


Version and / or Patch Used: Iometer 2014


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


Max IOPS Read




Max IOPS Write







The 4TB EVO comes in right at factory specs. Corsair's Neutron XTi delivers the highest read/write IOPS of the bunch.



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




Avg. Read Response






As we've seen all along, the 4TB EVO delivers better 4K QD1 read performance; the 2TB EVO better 4K QD1 write response. The 850 Pro wins this test outright by delivering the best (lowest) read/write response of the bunch.



DiskBench - Directory Copy


Version and / or Patch Used:


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 DC P3700 PCIe 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




Read Transfer Rate






Corsair's Neutron XTi wins for the best read performance and the 2TB 850 EVO wins for the best write performance. This test was run on Windows 10 build 10586. Watch what happens when we run it on build 14393 when we get to our MOP (Maxed Out Performance) testing.

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