Average Bench: 67.8% (576th of 980)

Based on 1,826 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 32.1% 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 306MB/s
Avg. 4K Random Read Speed 23.4MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.9%. 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 162MB/s
Avg. Sustained Write Speed 188MB/s
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Average Bench

(Based on 1,826 samples)
Min Avg Max
325 Read 421 493
54.5 Write 211 262
87.5 Mixed 162 197
46 SusWrite 188 254
54.3% 246 MB/s
Min Avg Max
11 4K Read 23.4 34.9
24.7 4K Write 56.9 92.3
14.4 4K Mixed 22.6 30.7
94.5% 34.3 MB/s
Min Avg Max
94.4 DQ Read 306 372
54.1 DQ Write 189 257
45.1 DQ Mixed 72.2 84.5
101% 189 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
76GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 72 58 52 57 62 53 MB/s
Read 479
Write 98.2
Mixed 128
SusWrite 59.1
41% 191 MB/s
4K Read 34.2
4K Write 59.6
4K Mixed 25.2
116% 39.7 MB/s
DQ Read 359
DQ Write 116
DQ Mixed 54.2
88% 176 MB/s
45GB free (System drive)
Firmware: EXT49D0Q
SusWrite @10s intervals: 123 100 190 157 67 61 MB/s
Read 458
Write 245
Mixed 162
SusWrite 116
54% 245 MB/s
4K Read 25.4
4K Write 53.2
4K Mixed 26.2
100% 34.9 MB/s
DQ Read 358
DQ Write 153
DQ Mixed 73.6
103% 195 MB/s
80GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 184 208 201 193 167 145 MB/s
Read 404
Write 247
Mixed 160
SusWrite 183
55% 249 MB/s
4K Read 21.1
4K Write 46.1
4K Mixed 23.3
86% 30.2 MB/s
DQ Read 366
DQ Write 208
DQ Mixed 77.1
114% 217 MB/s
204GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 245 251 250 254 253 252 MB/s
Read 374
Write 261
Mixed 179
SusWrite 251
60% 266 MB/s
4K Read 10.9
4K Write 27.8
4K Mixed 16.1
52% 18.3 MB/s
DQ Read 353
DQ Write 256
DQ Mixed 76.3
119% 228 MB/s
1,826 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 11,454,160 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 2,443 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 13%
Tree trunk
Desktop
Desktop 41%
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.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) January 2019 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

980 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 $360Nvidia GTX 1070 $320Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $204Samsung 850 Evo 500GB $110
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $780SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $125SanDisk Extreme 16GB $22
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