Average Bench: 79% (229th of 885)

Based on 13,020 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]

ADVERTISEMENT

Good average bench

The Samsung 840 Pro 128GB averaged 20.9% 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 78.8MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 128GB is 42.2%. 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 47.1MB/s
Avg. Sequential Write Speed 298MB/s
ADVERTISEMENT

Average Bench

(Based on 13,020 samples)
Min Avg Max
370 Read 487 521
100 Write 298 438
141 Mixed 326 474
81.9% 370 MB/s
Min Avg Max
20.5 4K Read 29.1 36
43.7 4K Write 78.8 112
14.6 4K Mixed 20.2 25.2
112% 42.7 MB/s
Min Avg Max
25.9 DQ Read 201 362
66.8 DQ Write 182 310
15.8 DQ Mixed 47.1 79.1
74.7% 143 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
24GB free
Firmware: DXM06B0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 505
Write 366
Mixed 430
96% 434 MB/s
4K Read 32.2
4K Write 103
4K Mixed 21.9
131% 52.3 MB/s
DQ Read 363
DQ Write 299
DQ Mixed 67.2
122% 243 MB/s
46GB free
Firmware: DXM06B0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 514
Write 439
Mixed 465
105% 473 MB/s
4K Read 23.2
4K Write 38.5
4K Mixed 21.1
82% 27.6 MB/s
DQ Read 24.7
DQ Write 62.5
DQ Mixed 17.2
21% 34.8 MB/s
20GB free
Firmware: DXM0 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 486
Write 94.7
Mixed 202
56% 261 MB/s
4K Read 35.8
4K Write 94.9
4K Mixed 14.2
123% 48.3 MB/s
DQ Read 317
DQ Write 90
DQ Mixed 49.7
77% 152 MB/s
50GB free
Firmware: DXM03B0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 489
Write 282
Mixed 278
77% 350 MB/s
4K Read 24.4
4K Write 45.8
4K Mixed 17.8
84% 29.3 MB/s
DQ Read 25.6
DQ Write 48.1
DQ Mixed 15.1
18% 29.6 MB/s
13,020 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 5,693,496 SSDs tested.

 Prices

Approx. $131 @ launch in Oct '12
AmazonUS $1606 months
OutletPCUS $19813 months
Send price feedback
Typical 840 Pro 128GB Builds (Compare 7,813 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 59%
Gunboat
Desktop
Desktop 64%
Destroyer
Workstation
Workstation 39%
Jet ski

Motherboard: Asrock Z77 Extreme4 - $270

EDIT WITH CUSTOM PC BUILDER Value: 61% - Good Total price: $1,100

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.

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) February 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.

 Comments

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

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

Added 4 years ago.

Excellent (edit your comment) Add link

9 days ago.

Great SSD one of the best


Above average

4 years ago.


Your
opinion?
885 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 i7-8700K $313Nvidia GTX 1070 $430Samsung 850 Evo 250GB $88
Intel Core i7-7700K $288Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $146
AMD Ryzen 5 1600 $170AMD RX 480 $400Samsung 850 Pro 256GB $125
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $185SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $79G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $42Corsair Vengeance LPX DDR4 3200 C16 2x8GB $206SanDisk Extreme 16GB $18
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback