Average Bench: 82.5% (167th of 862)

Based on 2,989 user benchmarks.  Models: Samsung SSD 840 PRO Series, Samsung SSD 840, Samsung SSD 840 PRO Seri, Samsung SSD 840 PRO

Very good average bench

The Samsung 840 Pro 512GB averaged just 17.5% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung 840 Pro 512GB near the top of the comparison list.


Avg. 4K Random Read Speed 27.8MB/s
Avg. 4K Random Write Speed 74.5MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 512GB is 58.2%. This is a relatively wide range which indicates that the Samsung 840 Pro 512GB performs inconsistently under varying real world conditions.


Avg. 4K-64Thread Read Speed 199MB/s
Avg. Sequential Write Speed 347MB/s

Average Bench

(Based on 2,989 samples)
Min Avg Max
361 Read 490 523
92 Write 347 497
151 Mixed 392 508
91% 410 MB/s
Min Avg Max
14.1 4K Read 27.8 36.2
34.9 4K Write 74.5 117
13.3 4K Mixed 23.1 30.5
111% 41.8 MB/s
Min Avg Max
22.9 DQ Read 199 374
59.1 DQ Write 186 319
14.4 DQ Mixed 60.5 103
81.5% 148 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
152GB free
Firmware: DXM0 Max speed: SATA 3.0 600 MB/s
Read 524
Write 501
Mixed 505
114% 510 MB/s
4K Read 37.1
4K Write 136
4K Mixed 4.01
133% 59 MB/s
DQ Read 342
DQ Write 299
DQ Mixed 83.2
127% 241 MB/s
270GB free
Firmware: DXM05B0Q Max speed: SATA 3.0 600 MB/s
Read 516
Write 480
Mixed 493
111% 496 MB/s
4K Read 28.8
4K Write 117
4K Mixed 26.4
139% 57.3 MB/s
DQ Read 34.2
DQ Write 311
DQ Mixed 27.2
64% 124 MB/s
329GB free
Firmware: DXM05B0Q Max speed: SATA 3.0 600 MB/s
Read 518
Write 477
Mixed 484
110% 493 MB/s
4K Read 35.6
4K Write 111
4K Mixed 22.2
141% 56.3 MB/s
DQ Read 36.4
DQ Write 310
DQ Mixed 26.7
64% 124 MB/s
176GB free
Firmware: DXM0 Max speed: SATA 3.0 600 MB/s
Read 501
Write 432
Mixed 507
107% 480 MB/s
4K Read 19.5
4K Write 43
4K Mixed 20.5
79% 27.7 MB/s
DQ Read 249
DQ Write 228
DQ Mixed 98.5
112% 192 MB/s
2,989 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 4,432,791 SSDs tested.


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Typical 840 Pro 512GB Builds (Compare 4,458 builds) See popular component choices, score breakdowns and rankings.
Gaming 64%
Desktop 79%
Workstation 58%

Motherboard: Asus MAXIMUS VII HERO

EDIT WITH CUSTOM PC BUILDER Value: 65% - Good Total price: $1,134

Popular 840 Pro 512GB compatible motherboards:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) November 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]


Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

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862 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i7-7700K $288Nvidia GTX 1070 $410Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $270AMD RX 480 $240Samsung 850 Pro 256GB $110
Intel Core i5-7600K $200Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $189SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55Corsair Vengeance LPX DDR4 3200 C16 2x8GB $195SanDisk Ultra Fit 32GB $12
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