Average Bench: 78% (212th of 848)

Based on 7,179 user benchmarks.  Models: Samsung SSD 840 PRO Series, Samsung SSD 840, Samsung SSD 840 PRO Seri, Samsung SSD 840 PRO

The 128GB 840 Pro is a rock solid performer. On release, nearly a year and a half ago, the Pro smashed several speed records. Today, with sequential read/write speeds of 519/438 MBps, the Pro is still one of the fastest SSDs available. One of the Pro's top competitors is Samsungs own, newer 840 Evo. Looking at a raw synthetic speed comparison of the 128GB Pro and Evo is a little misleading. On the face of it the Pro only has a marginal lead over the Evo. This due to the fact that the Evo can only maintain its burst write speed for transfers of up to 3GB, the size of its SLC cache. The Pro on the other hand can sustain higher throughputs indefinitely. The Pro also utilizes MLC which is rated for far more erase cycles than the TLC used in the Evo. Server IO is often continuous and would quickly exhaust the 3GB cache on the Evo but for typical consumer use the Evo will remain within the SLC cache most of the time. [Feb '14 SSDrivePro]

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Good average bench

The Samsung 840 Pro 128GB averaged 21.9% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung 840 Pro 128GB near the top of the comparison list.

Strengths

Avg. 4K Random Read Speed 29.1MB/s
Avg. 4K Random Write Speed 77.7MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 128GB is 45.6%. This is a relatively wide range which indicates that the Samsung 840 Pro 128GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 44.7MB/s
Avg. 4K-64Thread Read Speed 177MB/s
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Average Bench

(Based on 7,179 samples)
Min Avg Max
368 Read 485 521
109 Write 299 438
141 Mixed 326 473
81.8% 370 MB/s
Min Avg Max
20.8 4K Read 29.1 36.4
43.7 4K Write 77.7 117
14.1 4K Mixed 20 25.3
111% 42.3 MB/s
Min Avg Max
26.8 DQ Read 177 368
66.7 DQ Write 176 312
15.2 DQ Mixed 44.7 77.7
69.7% 132 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
67GB free
Firmware: DXM04B0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 520
Write 375
Mixed 378
94% 424 MB/s
4K Read 35.7
4K Write 113
4K Mixed 22.9
143% 57.2 MB/s
DQ Read 356
DQ Write 306
DQ Mixed 69.3
124% 244 MB/s
90GB free
Firmware: DXM05B0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 495
Write 343
Mixed 402
92% 413 MB/s
4K Read 30.8
4K Write 110
4K Mixed 18.3
128% 52.9 MB/s
DQ Read 331
DQ Write 320
DQ Mixed 17.1
98% 223 MB/s
17GB free
Firmware: DXM06B0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 387
Write 151
Mixed 166
51% 234 MB/s
4K Read 23.3
4K Write 59.1
4K Mixed 17.1
88% 33.2 MB/s
DQ Read 33
DQ Write 114
DQ Mixed 21.1
31% 55.9 MB/s
7,179 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,595,267 SSDs tested.

 Prices

AmazonUS $130.002 months ago.
OutletPCUS $197.702 months ago.
EbayUS $235.003 mins ago.
Send price feedback
Typical 840 Pro 128GB Builds (Compare 5,650 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 60%
Gunboat
Desktop
Desktop 65%
Battle cruiser
Workstation
Workstation 40%
Jet ski

Motherboard: Asrock Z77 Extreme4 - $147

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $1,046

Popular 840 Pro 128GB 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.

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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.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) April 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]

 Comments

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

Delivers high speeds for both compressible and incompressible data...

Added 3 years ago.

Good (edit your comment) Add link

1 month ago.

Great SSD one of the best


Above average

3 years ago.


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848 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.
CPUGPUSSD
Intel Core i7-7700K $310Nvidia GTX 1070 $330Samsung 850 Evo 250GB $106
Intel Core i5-7600K $229AMD RX 480 $217Samsung 850 Pro 256GB $140
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $219Samsung 850 Evo 500GB $170
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $122SanDisk Extreme 64GB $35
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $137SanDisk Ultra Fit 32GB $9
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