Average Bench: 67% (639th of 1011)

Based on 1,749 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 33.0% 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 305MB/s
Avg. 4K-64Thread Mixed IO Speed 71.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 37.2%. 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 161MB/s
Avg. Sustained Write Speed 189MB/s
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Average Bench

(Based on 1,749 samples)
Min Avg Max
322 Read 416 491
57 Write 206 262
88.5 Mixed 161 196
47.8 SusWrite 189 253
53.8% 243 MB/s
Min Avg Max
11.9 4K Read 22.5 33
28.5 4K Write 55.4 87.4
13.7 4K Mixed 22.2 30.1
91.8% 33.3 MB/s
Min Avg Max
110 DQ Read 305 372
50.9 DQ Write 190 257
29.6 DQ Mixed 71.8 83.8
101% 189 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
215GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 223 248 248 249 247 250 MB/s
Read 472
Write 252
Mixed 177
SusWrite 244
64% 286 MB/s
4K Read 37
4K Write 89.8
4K Mixed 29.8
142% 52.2 MB/s
DQ Read 367
DQ Write 244
DQ Mixed 80.2
121% 230 MB/s
195GB free (System drive)
Firmware: EXT49D0Q
SusWrite @10s intervals: 209 236 249 252 251 250 MB/s
Read 484
Write 256
Mixed 189
SusWrite 241
65% 293 MB/s
4K Read 29.6
4K Write 90.3
4K Mixed 29.1
130% 49.7 MB/s
DQ Read 368
DQ Write 246
DQ Mixed 81.2
122% 232 MB/s
159GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 221 219 243 247 250 247 MB/s
Read 449
Write 246
Mixed 181
SusWrite 238
62% 278 MB/s
4K Read 21.4
4K Write 40.6
4K Mixed 23.2
84% 28.4 MB/s
DQ Read 370
DQ Write 233
DQ Mixed 78.7
119% 228 MB/s
129GB free (System drive)
Firmware: EXT49D0Q
SusWrite @10s intervals: 216 214 227 238 229 244 MB/s
Read 360
Write 258
Mixed 157
SusWrite 228
56% 251 MB/s
4K Read 22.9
4K Write 42.9
4K Mixed 23.7
88% 29.8 MB/s
DQ Read 216
DQ Write 167
DQ Mixed 69.9
85% 151 MB/s
101GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 199 182 190 180 179 171 MB/s
Read 348
Write 245
Mixed 174
SusWrite 183
53% 238 MB/s
4K Read 12.2
4K Write 34
4K Mixed 17.8
59% 21.3 MB/s
DQ Read 361
DQ Write 256
DQ Mixed 78.7
121% 232 MB/s
21GB free (System drive)
Firmware: EXT49D0Q
SusWrite @10s intervals: 68 77 84 74 50 110 MB/s
Read 476
Write 57.1
Mixed 73.5
SusWrite 77.1
37% 171 MB/s
4K Read 24.7
4K Write 41.3
4K Mixed 13.3
76% 26.4 MB/s
DQ Read 328
DQ Write 63
DQ Mixed 64.8
81% 152 MB/s
75GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 165 93 59 57 51 141 MB/s
Read 394
Write 69.2
Mixed 102
SusWrite 94.5
36% 165 MB/s
4K Read 18.8
4K Write 40.8
4K Mixed 18.4
74% 26 MB/s
DQ Read 309
DQ Write 54
DQ Mixed 67.6
79% 144 MB/s
1,749 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 17,726,656 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 3,807 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 12%
Tree trunk
Desktop
Desktop 40%
Speed boat
Workstation
Workstation 21%
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.
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  • - 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) September 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

1011 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 i5-9400F $140Nvidia GTX 1660 $220Samsung 850 Evo 250GB $70
Intel Core i5-9600K $225Nvidia GTX 1660-Ti $275Samsung 850 Evo 500GB $90
Intel Core i7-9700K $350Nvidia RTX 2060S (Super) $429Samsung 850 Pro 256GB $230
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $70SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $37G.SKILL Trident Z DDR4 3200 C14 4x16GB $799SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $64Corsair Vengeance LPX DDR4 3200 C16 2x8GB $73SanDisk Extreme 16GB $24
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