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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

Moderate Workload Model


We categorize these tests as indicative of a moderate workload environment.


PCMark Vantage - Hard Disk Tests


Version and / or Patch Used:


The reason we like PCMark Vantage is because the recorded traces are played back without system stops. What we see is the raw performance of the drive. This allows us to see a marked difference between scoring that other trace-based benchmarks do not exhibit. An example of a marked difference in scoring on the same drive would be empty vs. filled vs. steady state.


We run Vantage three ways. The first run is with the OS drive 75% full to simulate a lightly used OS volume filled with data to an amount we feel is common for most users. The second run is with the OS volume written into a "Steady State" utilizing SNIA's guidelines. Steady state testing simulates a drive's performance similar to that of a drive that been subjected to consumer workloads for extensive amounts of time. The third run is a Vantage HDD test with the test drive attached as an empty, lightly used secondary device.


OS Volume 75% Full - Lightly Used





OS Volume 75% Full - Steady-State




Secondary Volume Empty - FOB




There's a big difference between an empty drive, one that's 75% full/used, and one that's in a steady-state.




The important scores to pay attention to are "OS Volume Steady-State" and "OS Volume 75% full." These two categories are most important because they are indicative of typical of consumer user states. When a drive is in a steady-state, it means garbage collection is running at the same time it's reading/writing. This is exactly why we focus on steady-state performance.


The 4TB EVO's larger pSLC cache pays dividends when the drive is in a steady-state. The 4TB EVO's steady-state performance is significantly better than the 2TB model. Samsung's 850 Pro easily wins this test outperforming the field across the board. OWC claims their Mercury Electra doesn't need TRIM. We disagree.



PCMark 7 - System Storage


Version and / or Patch Used: 1.4.0


We will look to Raw System Storage scoring for evaluation because it's done without system stops and, therefore, allows us to see significant scoring differences between drives.


OS Volume 75% Full - Lightly Used






Samsung's 850 Series SSDs deliver by far the best moderate workload performance. The only SSD that is even close to Samsung's 850 Series SSDs is OCZ's VX500. The 2TB 850 Pro is in a class of its own in this particular test. The Mercury Electra is also in a class of its own.



PCMark 8 - Storage Bandwidth


Version and / or Patch Used: 2.4.304


We use PCMark 8 Storage benchmark to test the performance of SSDs, HDDs, and hybrid drives with traces recorded from Adobe Creative Suite, Microsoft Office, and a selection of popular games. You can test the system drive or any other recognized storage device, including local external drives. Unlike synthetic storage tests, the PCMark 8 Storage benchmark highlights real-world performance differences between storage devices.


OS Volume 75% Full - Lightly Used






PCMark 8 is the most intensive moderate workload simulation we run. With respect to moderate workloads, this test is what we consider the best indicator of a drive's overall performance. The 4TB EVO sets a new lab record by handily outperforming the 2TB EVO.


This score, in particular, is the reason why we believe the 4TB 850 EVO is the best performing SATA SSD ever made. The other drives in our test pool do not handle moderate workloads nearly as well.

    We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.

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