Average Bench: 60.2% (496th of 850)

Based on 348 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 39.7% 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 22.9MB/s
Avg. Sequential Read Speed 476MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 37.8%. 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 25.3MB/s
Avg. Sequential Write Speed 179MB/s
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Average Bench

(Based on 348 samples)
Min Avg Max
355 Read 476 515
36.5 Write 179 260
71.6 Mixed 239 345
65.2% 298 MB/s
Min Avg Max
13.5 4K Read 22.9 29.3
25.2 4K Write 53.8 88.8
7.49 4K Mixed 12.5 16.2
79.2% 29.7 MB/s
Min Avg Max
19.6 DQ Read 194 360
36.5 DQ Write 136 253
9.34 DQ Mixed 25.3 39.5
56.7% 118 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
81GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 501
Write 256
Mixed 319
79% 359 MB/s
4K Read 19.8
4K Write 85.2
4K Mixed 12.9
92% 39.3 MB/s
DQ Read 310
DQ Write 254
DQ Mixed 36.2
94% 200 MB/s
192GB free
Firmware: EXT08D0Q
SYSTEM 4KALIGNED
Read 496
Write 256
Mixed 340
80% 364 MB/s
4K Read 23.6
4K Write 58
4K Mixed 13.8
84% 31.8 MB/s
DQ Read 350
DQ Write 251
DQ Mixed 39.5
100% 214 MB/s
138GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 491
Write 176
Mixed 251
67% 306 MB/s
4K Read 21.6
4K Write 58.7
4K Mixed 14.1
82% 31.4 MB/s
DQ Read 362
DQ Write 189
DQ Mixed 34.9
90% 195 MB/s
149GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 501
Write 228
Mixed 313
76% 347 MB/s
4K Read 17.4
4K Write 29.4
4K Mixed 13.6
59% 20.1 MB/s
DQ Read 249
DQ Write 181
DQ Mixed 36.7
76% 156 MB/s
194GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 499
Write 259
Mixed 352
82% 370 MB/s
4K Read 21.1
4K Write 58.7
4K Mixed 10.3
76% 30 MB/s
DQ Read 19.8
DQ Write 47.5
DQ Mixed 32.7
25% 33.3 MB/s
55GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 487
Write 131
Mixed 211
60% 276 MB/s
4K Read 17.7
4K Write 45
4K Mixed 11.2
65% 24.6 MB/s
DQ Read 23.4
DQ Write 165
DQ Mixed 9.9
32% 66 MB/s
46GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 456
Write 51.9
Mixed 101
43% 203 MB/s
4K Read 22.7
4K Write 44.7
4K Mixed 9.76
70% 25.7 MB/s
DQ Read 28.1
DQ Write 97.1
DQ Mixed 12.2
24% 45.8 MB/s
348 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,833,001 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 664 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 15%
Tree trunk
Desktop
Desktop 53%
Yacht
Workstation
Workstation 34%
Sail boat

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 69% - 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.
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  • - RAM tests include: single/multi core bandwidth and latency.
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Solid State Drive Rankings (Price vs Performance) May 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]

850 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 $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $102
Intel Core i5-7600K $240AMD RX 480 $210Samsung 850 Pro 256GB $127
AMD Ryzen 7 1700 $300Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $167
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $136SanDisk Ultra Fit 32GB $13
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