Average Bench: 58.8% (601st of 929)

Based on 697 user benchmarks.  Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Average average bench

The Samsung PM851 2.5 7mm 256GB averaged 41.1% 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 22.7MB/s
Avg. Sequential Read Speed 474MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 37.2%. 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 24.6MB/s
Avg. Sequential Write Speed 169MB/s
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Average Bench

(Based on 697 samples)
Min Avg Max
337 Read 474 514
36.7 Write 169 261
70.3 Mixed 233 346
63.9% 292 MB/s
Min Avg Max
14 4K Read 22.7 29.7
25.1 4K Write 53.3 92.5
7.49 4K Mixed 12.4 16
78.4% 29.4 MB/s
Min Avg Max
18.2 DQ Read 178 359
37 DQ Write 128 252
9.02 DQ Mixed 24.6 39.3
53.1% 110 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
22GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 518
Write 258
Mixed 327
81% 368 MB/s
4K Read 29.7
4K Write 95.7
4K Mixed 15.6
116% 47 MB/s
DQ Read 310
DQ Write 161
DQ Mixed 28.3
76% 166 MB/s
175GB free
Firmware: EXT0 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 498
Write 219
Mixed 314
76% 344 MB/s
4K Read 23.9
4K Write 36.7
4K Mixed 12.7
72% 24.4 MB/s
DQ Read 359
DQ Write 234
DQ Mixed 34.7
96% 209 MB/s
85GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 510
Write 135
Mixed 201
61% 282 MB/s
4K Read 22.6
4K Write 57.1
4K Mixed 15.8
85% 31.8 MB/s
DQ Read 317
DQ Write 163
DQ Mixed 13.9
71% 165 MB/s
166GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 511
Write 126
Mixed 225
62% 287 MB/s
4K Read 25.7
4K Write 55.6
4K Mixed 14.5
87% 31.9 MB/s
DQ Read 299
DQ Write 139
DQ Mixed 25.9
70% 155 MB/s
47GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 516
Write 64.1
Mixed 134
51% 238 MB/s
4K Read 30
4K Write 71.4
4K Mixed 13.6
101% 38.3 MB/s
DQ Read 295
DQ Write 119
DQ Mixed 36.7
72% 150 MB/s
110GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 506
Write 220
Mixed 305
76% 344 MB/s
4K Read 22.1
4K Write 49.5
4K Mixed 13.5
77% 28.4 MB/s
DQ Read 23.5
DQ Write 228
DQ Mixed 11.6
43% 87.6 MB/s
133GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 468
Write 252
Mixed 330
77% 350 MB/s
4K Read 13.3
4K Write 14.9
4K Mixed 11.1
42% 13.1 MB/s
DQ Read 232
DQ Write 148
DQ Mixed 31
66% 137 MB/s
47GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 496
Write 140
Mixed 220
62% 285 MB/s
4K Read 16
4K Write 39.7
4K Mixed 12.2
61% 22.7 MB/s
DQ Read 251
DQ Write 140
DQ Mixed 36.1
70% 143 MB/s
697 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 7,231,067 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 1,708 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 14%
Tree trunk
Desktop
Desktop 52%
Yacht
Workstation
Workstation 33%
Sail boat

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 51% - Above average Total price: $500

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.

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) June 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]

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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

929 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 $347Nvidia GTX 1070 $413Samsung 850 Evo 250GB $104
AMD Ryzen 5 1600 $160Nvidia GTX 1060-6GB $270Samsung 850 Evo 500GB $125
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $160
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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