Average Bench: 68% (681st of 1058)

Based on 1,978 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 324MB/s
Avg. 4K Random Read Speed 23.1MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 44.9%. 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 176MB/s
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Average Bench

(Based on 1,978 samples)
Min Avg Max
323 Read 431 499
48.9 Write 189 262
77 Mixed 159 211
38.6 SusWrite 176 256
52.7% 239 MB/s
Min Avg Max
11.4 4K Read 23.1 34.2
27.5 4K Write 57.9 97.9
13.4 4K Mixed 23.2 31.3
95.3% 34.7 MB/s
Min Avg Max
105 DQ Read 324 374
48 DQ Write 177 256
41.9 DQ Mixed 72.5 84.4
102% 191 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
238GB free
Firmware: EXT08D0Q
SusWrite @10s intervals: 259 259 258 258 258 259 MB/s
Read 490
Write 262
Mixed 200
SusWrite 258
67% 303 MB/s
4K Read 26.8
4K Write 74.3
4K Mixed 27.3
115% 42.8 MB/s
DQ Read 370
DQ Write 252
DQ Mixed 84.7
124% 236 MB/s
198GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 191 238 239 256 258 256 MB/s
Read 479
Write 263
Mixed 188
SusWrite 240
65% 292 MB/s
4K Read 25.7
4K Write 66.6
4K Mixed 26.5
108% 39.6 MB/s
DQ Read 353
DQ Write 258
DQ Mixed 82.2
122% 231 MB/s
42GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 196 212 131 100 79 72 MB/s
Read 485
Write 177
Mixed 159
SusWrite 132
52% 238 MB/s
4K Read 21.7
4K Write 63.1
4K Mixed 25.6
99% 36.8 MB/s
DQ Read 326
DQ Write 139
DQ Mixed 68.3
94% 178 MB/s
186GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 117 193 192 186 181 184 MB/s
Read 314
Write 147
Mixed 153
SusWrite 176
44% 197 MB/s
4K Read 24
4K Write 40.1
4K Mixed 24.2
89% 29.4 MB/s
DQ Read 178
DQ Write 96.5
DQ Mixed 60
65% 112 MB/s
43GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 120 122 88 71 83 98 MB/s
Read 435
Write 67
Mixed 102
SusWrite 96.9
38% 175 MB/s
4K Read 22.4
4K Write 43
4K Mixed 12.7
73% 26 MB/s
DQ Read 282
DQ Write 96.9
DQ Mixed 54.6
76% 144 MB/s
1,978 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 43,100,489 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 11,187 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 8%
Tree trunk
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 7%
Tree trunk

Motherboard: Dell OptiPlex 9020

EDIT WITH CUSTOM PC BUILDER Value: 80% - Excellent Total price: $223

Popular PM851 2.5 7mm 256GB 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.
  • - 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) May 2021 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

1058 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
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Intel Core i5-11600K $259Nvidia RTX 3070 $500Samsung 850 Evo 120GB $78
Intel Core i5-10600K $210Nvidia RTX 3080 $700Samsung 860 Evo 250GB $50
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $102SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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