Average Bench: 67.9% (633rd of 1018)

Based on 1,396 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 32.0% 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-64Thread Read Speed 318MB/s
Avg. 4K Random Read Speed 22.7MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 40.7%. 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. Sequential Mixed IO Speed 159MB/s
Avg. Sustained Write Speed 180MB/s
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Average Bench

(Based on 1,396 samples)
Min Avg Max
335 Read 432 494
52.7 Write 194 262
80.8 Mixed 159 199
46.8 SusWrite 180 254
53.3% 241 MB/s
Min Avg Max
12.3 4K Read 22.7 30.6
26.6 4K Write 57.2 96.6
14.3 4K Mixed 23.2 30.1
94.3% 34.4 MB/s
Min Avg Max
125 DQ Read 318 373
52 DQ Write 179 256
29.4 DQ Mixed 71.9 84.2
101% 190 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
183GB free
Firmware: EXT08D0Q
SusWrite @10s intervals: 251 251 251 252 251 251 MB/s
Read 451
Write 258
Mixed 196
SusWrite 251
64% 289 MB/s
4K Read 23.2
4K Write 87.3
4K Mixed 24.9
113% 45.1 MB/s
DQ Read 359
DQ Write 250
DQ Mixed 78
120% 229 MB/s
211GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 251 251 252 252 253 252 MB/s
Read 437
Write 259
Mixed 178
SusWrite 252
63% 281 MB/s
4K Read 16.8
4K Write 33.6
4K Mixed 20.9
70% 23.8 MB/s
DQ Read 174
DQ Write 140
DQ Mixed 74.1
78% 129 MB/s
211GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 237 248 248 252 250 250 MB/s
Read 439
Write 254
Mixed 175
SusWrite 248
62% 279 MB/s
4K Read 14.5
4K Write 33.5
4K Mixed 19.7
65% 22.6 MB/s
DQ Read 176
DQ Write 139
DQ Mixed 74.4
78% 130 MB/s
29GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 89 56 60 85 104 126 MB/s
Read 361
Write 49
Mixed 58.5
SusWrite 86.5
30% 139 MB/s
4K Read 27.5
4K Write 43.4
4K Mixed 17.2
87% 29.4 MB/s
DQ Read 30.4
DQ Write 41.7
DQ Mixed 21
20% 31 MB/s
1,396 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 24,100,477 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 5,114 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 13%
Tree trunk
Desktop
Desktop 51%
Yacht
Workstation
Workstation 31%
Sail boat

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 49% - Average Total price: $484

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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) April 2020 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]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.

 Comments

1018 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 i5-9600K $210Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $49
Intel Core i5-9400F $146Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2070S (Super) $500Samsung 850 Pro 512GB $249
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $42Corsair Vengeance LPX DDR4 3200 C16 2x8GB $84SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $681SanDisk Ultra Fit 32GB $16
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