Average Bench: 60.8% (479th of 848)

Based on 293 user benchmarks.  Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Above average average bench

The Samsung PM851 2.5 7mm 256GB averaged 39.2% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K Random Read Speed 23.1MB/s
Avg. Sequential Read Speed 478MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 37.5%. This is a relatively wide range which indicates that the Samsung PM851 2.5 7mm 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 25.6MB/s
Avg. Sequential Write Speed 182MB/s
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Average Bench

(Based on 293 samples)
Min Avg Max
371 Read 478 514
37 Write 182 260
72.6 Mixed 241 344
65.6% 300 MB/s
Min Avg Max
13.6 4K Read 23.1 29.7
23 4K Write 54.1 92.5
7.34 4K Mixed 12.5 16.2
79.7% 29.9 MB/s
Min Avg Max
19.6 DQ Read 199 361
35.6 DQ Write 138 254
8.97 DQ Mixed 25.6 39.6
57.8% 121 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
156GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 499
Write 259
Mixed 348
81% 369 MB/s
4K Read 22.6
4K Write 75
4K Mixed 12.5
90% 36.7 MB/s
DQ Read 26.3
DQ Write 73.6
DQ Mixed 37.7
32% 45.9 MB/s
207GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 491
Write 250
Mixed 337
79% 360 MB/s
4K Read 21.3
4K Write 58.4
4K Mixed 9.89
76% 29.9 MB/s
DQ Read 19.9
DQ Write 246
DQ Mixed 9.88
44% 91.9 MB/s
80GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 493
Write 72.5
Mixed 117
49% 228 MB/s
4K Read 24.1
4K Write 48.4
4K Mixed 12.9
79% 28.5 MB/s
DQ Read 111
DQ Write 95.4
DQ Mixed 22.4
39% 76.1 MB/s
104GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 479
Write 177
Mixed 244
66% 300 MB/s
4K Read 22.8
4K Write 34.3
4K Mixed 7.48
62% 21.5 MB/s
DQ Read 14.6
DQ Write 163
DQ Mixed 8.64
31% 62.2 MB/s
19GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 405
Write 41.2
Mixed 103
39% 183 MB/s
4K Read 23
4K Write 40
4K Mixed 13.7
74% 25.6 MB/s
DQ Read 331
DQ Write 112
DQ Mixed 33.5
74% 159 MB/s
111GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 484
Write 87.7
Mixed 159
52% 244 MB/s
4K Read 19.4
4K Write 45.7
4K Mixed 9.67
66% 24.9 MB/s
DQ Read 20.8
DQ Write 31.2
DQ Mixed 9.62
12% 20.6 MB/s
293 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,355,258 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 582 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 15%
Tree trunk
Desktop
Desktop 54%
Yacht
Workstation
Workstation 38%
Jet ski

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good Total price: $249

Popular PM851 2.5 7mm 256GB systems:

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.
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Solid State Drive Rankings (Price vs Performance) March 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]

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 $370Samsung 850 Evo 250GB $94
AMD Ryzen 7 1700 $325AMD RX 480 $193Samsung 850 Pro 256GB $138
Intel Core i5-7600K $215Nvidia GTX 1060-6GB $235Samsung 850 Evo 500GB $160
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $110SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $650SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $50Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $9
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