Average Bench: 65% (725th of 1058)

Based on 5,580 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 34.9% 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 316MB/s
Avg. 4K-64Thread Mixed IO Speed 72.2MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 41.4%. 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 156MB/s
Avg. Sustained Write Speed 170MB/s
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Average Bench

(Based on 5,580 samples)
Min Avg Max
323 Read 416 487
46.2 Write 193 260
81.8 Mixed 156 196
40.6 SusWrite 170 252
51.6% 234 MB/s
Min Avg Max
11.2 4K Read 22.3 34.1
22.7 4K Write 52.8 84.3
13.1 4K Mixed 21.9 29.4
89.8% 32.3 MB/s
Min Avg Max
148 DQ Read 316 372
49.3 DQ Write 175 256
40.8 DQ Mixed 72.2 83.1
100% 188 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
196GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 257 255 254 255 255 255 MB/s
Read 422
Write 261
Mixed 194
SusWrite 255
63% 283 MB/s
4K Read 28.1
4K Write 93.8
4K Mixed 27.2
127% 49.7 MB/s
DQ Read 362
DQ Write 251
DQ Mixed 82
122% 232 MB/s
204GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 207 239 251 227 206 201 MB/s
Read 432
Write 259
Mixed 205
SusWrite 222
62% 280 MB/s
4K Read 28.3
4K Write 80.3
4K Mixed 26.8
120% 45.1 MB/s
DQ Read 362
DQ Write 255
DQ Mixed 83.3
123% 233 MB/s
208GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 236 251 254 252 254 254 MB/s
Read 433
Write 258
Mixed 181
SusWrite 250
62% 281 MB/s
4K Read 27.7
4K Write 68.1
4K Mixed 25.7
111% 40.5 MB/s
DQ Read 373
DQ Write 257
DQ Mixed 82.2
124% 237 MB/s
102GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 137 61 50 194 216 182 MB/s
Read 415
Write 80.5
Mixed 99.2
SusWrite 140
40% 184 MB/s
4K Read 23.3
4K Write 41.1
4K Mixed 21.7
85% 28.7 MB/s
DQ Read 353
DQ Write 73.4
DQ Mixed 73.1
90% 166 MB/s
8GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 38 30 31 31 27 32 MB/s
Read 354
Write 68
Mixed 76.7
SusWrite 31.4
29% 133 MB/s
4K Read 15
4K Write 34.9
4K Mixed 17.5
64% 22.5 MB/s
DQ Read 317
DQ Write 43.6
DQ Mixed 36.3
63% 132 MB/s
5,580 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,061,766 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 3,099 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

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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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.
Solid State Drive Rankings (Price vs Performance) September 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
Intel Core i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 850 Evo 120GB $183
Intel Core i7-11700K $346Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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