Average Bench: 60.1% (579th of 927)

Based on 1,654 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 39.8% 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 23.3MB/s
Avg. Sequential Read Speed 478MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 37.9%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 23.4MB/s
Avg. Sequential Write Speed 191MB/s
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Average Bench

(Based on 1,654 samples)
Min Avg Max
364 Read 478 510
36.6 Write 191 261
70.5 Mixed 257 347
67.7% 309 MB/s
Min Avg Max
11.9 4K Read 23.3 33.8
21 4K Write 52.8 85.4
7.1 4K Mixed 12.2 16.1
78.9% 29.4 MB/s
Min Avg Max
18.5 DQ Read 158 353
29.1 DQ Write 134 249
8.45 DQ Mixed 23.4 38.8
51% 105 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
221GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 509
Write 258
Mixed 337
81% 368 MB/s
4K Read 38.8
4K Write 98.3
4K Mixed 16.9
132% 51.3 MB/s
DQ Read 351
DQ Write 254
DQ Mixed 16.7
90% 207 MB/s
208GB free
Firmware: EXT49D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 502
Write 253
Mixed 344
81% 366 MB/s
4K Read 24.6
4K Write 76.4
4K Mixed 11.9
93% 37.6 MB/s
DQ Read 325
DQ Write 231
DQ Mixed 10.3
80% 189 MB/s
168GB free
Firmware: EXT49D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 500
Write 227
Mixed 327
77% 351 MB/s
4K Read 25
4K Write 73.8
4K Mixed 9.95
90% 36.2 MB/s
DQ Read 230
DQ Write 209
DQ Mixed 10.3
65% 150 MB/s
34GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 494
Write 160
Mixed 220
64% 291 MB/s
4K Read 30.5
4K Write 53.3
4K Mixed 14.4
93% 32.7 MB/s
DQ Read 313
DQ Write 185
DQ Mixed 12.8
73% 170 MB/s
191GB free
Firmware: EXT4AD0Q
SYSTEM 4KALIGNED
Read 484
Write 258
Mixed 350
80% 364 MB/s
4K Read 15
4K Write 26.1
4K Mixed 11.4
51% 17.5 MB/s
DQ Read 299
DQ Write 220
DQ Mixed 31
85% 183 MB/s
183GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 257
Mixed 348
81% 367 MB/s
4K Read 16.7
4K Write 36
4K Mixed 9.71
57% 20.8 MB/s
DQ Read 87.5
DQ Write 74.2
DQ Mixed 29.4
36% 63.7 MB/s
47GB free
Firmware: EXT49D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 490
Write 53.8
Mixed 131
48% 225 MB/s
4K Read 25.2
4K Write 47.8
4K Mixed 12.6
80% 28.6 MB/s
DQ Read 335
DQ Write 46.7
DQ Mixed 12.6
55% 131 MB/s
78GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 173
Mixed 236
66% 302 MB/s
4K Read 22.8
4K Write 48.5
4K Mixed 12.3
76% 27.9 MB/s
DQ Read 24.6
DQ Write 51.8
DQ Mixed 27.6
24% 34.7 MB/s
1,654 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 7,134,069 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 1,851 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 13%
Tree trunk
Desktop
Desktop 42%
Speed boat
Workstation
Workstation 23%
Surfboard

System: Dell Latitude E7440

EDIT WITH CUSTOM PC BUILDER

Popular PM851 mSATA 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) 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

927 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 $320Nvidia GTX 1070 $447Samsung 850 Evo 250GB $104
AMD Ryzen 5 1600 $175Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $124
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $155
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $178SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $35HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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