Average Bench: 66.2% (680th of 1037)

Based on 4,423 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 33.7% 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 315MB/s
Avg. 4K Random Read Speed 22.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 40%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 159MB/s
Avg. Sustained Write Speed 181MB/s
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Average Bench

(Based on 4,423 samples)
Min Avg Max
325 Read 416 487
48.7 Write 200 262
85.4 Mixed 159 196
45.2 SusWrite 181 253
52.8% 239 MB/s
Min Avg Max
11.6 4K Read 22.8 33.5
25 4K Write 53.9 84.2
13.2 4K Mixed 22 29.4
91.2% 32.9 MB/s
Min Avg Max
136 DQ Read 315 372
52 DQ Write 179 257
42.8 DQ Mixed 71.7 83.8
100% 189 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
191GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 202 221 250 249 251 252 MB/s
Read 432
Write 253
Mixed 173
SusWrite 237
61% 274 MB/s
4K Read 30.4
4K Write 69.8
4K Mixed 26.7
117% 42.3 MB/s
DQ Read 368
DQ Write 247
DQ Mixed 82.9
122% 232 MB/s
211GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 242 235 239 239 239 237 MB/s
Read 472
Write 252
Mixed 185
SusWrite 238
64% 287 MB/s
4K Read 31.5
4K Write 68.5
4K Mixed 27.4
119% 42.5 MB/s
DQ Read 252
DQ Write 124
DQ Mixed 48.3
73% 141 MB/s
50GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 171 112 89 86 86 77 MB/s
Read 440
Write 222
Mixed 153
SusWrite 104
50% 230 MB/s
4K Read 24.5
4K Write 58.6
4K Mixed 23.4
98% 35.5 MB/s
DQ Read 364
DQ Write 168
DQ Mixed 76
107% 203 MB/s
205GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 191 114 106 113 156 125 MB/s
Read 410
Write 220
Mixed 177
SusWrite 134
52% 235 MB/s
4K Read 23
4K Write 66.7
4K Mixed 25.2
102% 38.3 MB/s
DQ Read 128
DQ Write 208
DQ Mixed 72.4
82% 136 MB/s
7GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 73 42 45 43 41 41 MB/s
Read 416
Write 91.3
Mixed 108
SusWrite 47.2
36% 166 MB/s
4K Read 24.4
4K Write 57.9
4K Mixed 20.5
94% 34.3 MB/s
DQ Read 368
DQ Write 69
DQ Mixed 68.5
89% 169 MB/s
192GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 128 99 112 91 98 94 MB/s
Read 376
Write 256
Mixed 177
SusWrite 104
51% 228 MB/s
4K Read 13.9
4K Write 23
4K Mixed 15.5
53% 17.5 MB/s
DQ Read 357
DQ Write 183
DQ Mixed 72.5
107% 204 MB/s
4,423 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,610,979 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 1,459 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 5%
Tree trunk
Desktop
Desktop 53%
Yacht
Workstation
Workstation 4%
Tree trunk

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

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  • - 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.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 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

1037 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 $195Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $45
Intel Core i5-9400F $140Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $289Nvidia RTX 2070S (Super) $505Samsung 860 Evo 250GB $43
HDDRAMUSB
Seagate Barracuda 1TB (2016) $35Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Extreme 16GB $28
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