Average Bench: 65.3% (723rd of 1058)

Based on 4,865 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 34.6% 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 325MB/s
Avg. 4K-64Thread Mixed IO Speed 72.5MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 40.2%. 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 154MB/s
Avg. Sustained Write Speed 169MB/s
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Average Bench

(Based on 4,865 samples)
Min Avg Max
314 Read 414 490
47.2 Write 187 261
76 Mixed 154 195
39 SusWrite 169 253
51% 231 MB/s
Min Avg Max
11.2 4K Read 22.6 34.1
21 4K Write 52.7 83
13.3 4K Mixed 22.1 29.8
90.4% 32.5 MB/s
Min Avg Max
153 DQ Read 325 373
47.1 DQ Write 174 257
47.3 DQ Mixed 72.5 83.8
101% 190 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
184GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 241 213 244 238 252 253 MB/s
Read 370
Write 263
Mixed 180
SusWrite 240
59% 263 MB/s
4K Read 19.3
4K Write 60.4
4K Mixed 19.8
87% 33.2 MB/s
DQ Read 309
DQ Write 258
DQ Mixed 68.9
110% 212 MB/s
102GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 144 126 163 185 189 193 MB/s
Read 332
Write 195
Mixed 160
SusWrite 167
47% 213 MB/s
4K Read 10
4K Write 33.7
4K Mixed 21.6
61% 21.8 MB/s
DQ Read 365
DQ Write 202
DQ Mixed 77.5
113% 215 MB/s
13GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 48 38 36 35 34 35 MB/s
Read 380
Write 51.6
Mixed 97.5
SusWrite 37.7
30% 142 MB/s
4K Read 22.5
4K Write 45.5
4K Mixed 24.7
90% 30.9 MB/s
DQ Read 373
DQ Write 42.1
DQ Mixed 62.5
82% 159 MB/s
207GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 186 218 176 180 191 215 MB/s
Read 340
Write 211
Mixed 158
SusWrite 194
50% 226 MB/s
4K Read 10.6
4K Write 39.2
4K Mixed 14.2
55% 21.3 MB/s
DQ Read 293
DQ Write 240
DQ Mixed 80
111% 204 MB/s
4,865 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 41,718,125 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 2,495 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

  • - 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.
  • - 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.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) April 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 i5-11400F $173Nvidia RTX 3070 $500Crucial MX500 250GB $48
Intel Core i5-11600K $265Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i7-10700K $316Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $50
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $73SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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