Average Bench: 63.7% (590th of 956)

Based on 1,627 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 36.3% 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 23.4MB/s
Avg. Sequential Read Speed 457MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 45.5%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 191MB/s
Avg. Sequential Write Speed 202MB/s
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Average Bench

(Based on 1,627 samples)
Min Avg Max
349 Read 457 509
40.7 Write 202 261
78.4 Mixed 225 346
43.6 SusWrite 191 253
59.5% 269 MB/s
Min Avg Max
11.6 4K Read 23.4 33.9
19.2 4K Write 54.9 93.1
7.14 4K Mixed 16.3 28.6
85.4% 31.5 MB/s
Min Avg Max
19.5 DQ Read 217 371
36.4 DQ Write 163 256
8.98 DQ Mixed 42 82.9
71.5% 140 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
213GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 232 232 201 164 160 193 MB/s
Read 442
Write 232
Mixed 180
SusWrite 197
58% 263 MB/s
4K Read 33.5
4K Write 75.3
4K Mixed 30
129% 46.3 MB/s
DQ Read 370
DQ Write 254
DQ Mixed 79.7
122% 234 MB/s
21GB free
Firmware: EXT4AD0Q
SusWrite @10s intervals: 206 131 56 30 28 31 MB/s
Read 474
Write 258
Mixed 197
SusWrite 80.2
56% 252 MB/s
4K Read 25.2
4K Write 93
4K Mixed 27.8
123% 48.7 MB/s
DQ Read 367
DQ Write 254
DQ Mixed 71.8
118% 231 MB/s
215GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 146 115 105 105 104 100 MB/s
Read 381
Write 169
Mixed 150
SusWrite 112
45% 203 MB/s
4K Read 18.6
4K Write 70.1
4K Mixed 16.9
87% 35.2 MB/s
DQ Read 368
DQ Write 180
DQ Mixed 72.1
107% 206 MB/s
101GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 170 151 216 235 246 246 MB/s
Read 314
Write 55.1
Mixed 149
SusWrite 211
40% 182 MB/s
4K Read 15.3
4K Write 23.2
4K Mixed 18
58% 18.8 MB/s
DQ Read 286
DQ Write 171
DQ Mixed 67.4
93% 175 MB/s
192GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 205 144 224 252 253 255 MB/s
Read 341
Write 213
Mixed 174
SusWrite 222
53% 238 MB/s
4K Read 8.9
4K Write 15.1
4K Mixed 7.7
31% 10.6 MB/s
DQ Read 228
DQ Write 195
DQ Mixed 75.7
94% 166 MB/s
1,627 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,546,251 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 2,191 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.
  • - 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.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 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 - 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

956 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 $370Nvidia GTX 1070 $344Samsung 850 Evo 250GB $86
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $114
Intel Core i5-8600K $260AMD RX 480 $280Samsung 850 Pro 256GB $135
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $150SanDisk Extreme 64GB $80
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $899SanDisk Extreme 32GB $30
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3200 C16 2x8GB $160SanDisk Ultra Fit 32GB $11
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