Average Bench: 65.4% (722nd of 1058)

Based on 5,531 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 34.5% 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 323MB/s
Avg. 4K-64Thread Mixed IO Speed 72.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.3%. 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 155MB/s
Avg. Sustained Write Speed 168MB/s
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Average Bench

(Based on 5,531 samples)
Min Avg Max
318 Read 416 491
48.6 Write 190 261
84.7 Mixed 155 195
39.4 SusWrite 168 252
51.2% 232 MB/s
Min Avg Max
11.1 4K Read 22.5 34.1
22.2 4K Write 53.6 84.2
13.3 4K Mixed 22.1 29.6
90.9% 32.8 MB/s
Min Avg Max
151 DQ Read 323 373
50 DQ Write 174 256
45 DQ Mixed 72.8 83.2
101% 190 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
102GB free
Firmware: EXT4AD0Q
SusWrite @10s intervals: 255 256 256 256 255 255 MB/s
Read 494
Write 260
Mixed 199
SusWrite 255
67% 302 MB/s
4K Read 33.1
4K Write 71.6
4K Mixed 30.1
127% 44.9 MB/s
DQ Read 229
DQ Write 197
DQ Mixed 74.3
94% 167 MB/s
190GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 187 170 240 236 246 248 MB/s
Read 423
Write 249
Mixed 174
SusWrite 221
59% 267 MB/s
4K Read 29.3
4K Write 63.8
4K Mixed 24
109% 39 MB/s
DQ Read 360
DQ Write 254
DQ Mixed 76
119% 230 MB/s
158GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 188 216 226 234 234 242 MB/s
Read 443
Write 244
Mixed 173
SusWrite 223
60% 271 MB/s
4K Read 25.4
4K Write 55.2
4K Mixed 24.9
100% 35.2 MB/s
DQ Read 372
DQ Write 208
DQ Mixed 81.6
116% 221 MB/s
198GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 177 197 241 248 263 262 MB/s
Read 469
Write 247
Mixed 196
SusWrite 232
63% 286 MB/s
4K Read 23.8
4K Write 48.7
4K Mixed 23.2
92% 31.9 MB/s
DQ Read 370
DQ Write 226
DQ Mixed 81.6
119% 226 MB/s
189GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 200 135 179 238 255 256 MB/s
Read 326
Write 258
Mixed 171
SusWrite 210
54% 241 MB/s
4K Read 23.6
4K Write 64.9
4K Mixed 24
101% 37.5 MB/s
DQ Read 369
DQ Write 251
DQ Mixed 79.1
122% 233 MB/s
88GB free (System drive)
Firmware: EXT49D0Q
SusWrite @10s intervals: 125 108 118 111 100 104 MB/s
Read 464
Write 122
Mixed 143
SusWrite 111
46% 210 MB/s
4K Read 27.5
4K Write 58.9
4K Mixed 27.1
108% 37.8 MB/s
DQ Read 347
DQ Write 157
DQ Mixed 75.3
103% 193 MB/s
195GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 240 252 252 237 255 249 MB/s
Read 384
Write 258
Mixed 180
SusWrite 248
60% 268 MB/s
4K Read 15.8
4K Write 42.9
4K Mixed 23.7
77% 27.5 MB/s
DQ Read 325
DQ Write 241
DQ Mixed 74.2
112% 213 MB/s
152GB free (System drive)
Firmware: EXT4AD0Q
SusWrite @10s intervals: 154 155 131 108 160 160 MB/s
Read 323
Write 156
Mixed 154
SusWrite 145
43% 195 MB/s
4K Read 12.1
4K Write 22.6
4K Mixed 15.2
50% 16.6 MB/s
DQ Read 22.8
DQ Write 134
DQ Mixed 57.6
50% 71.3 MB/s
5,531 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 44,172,041 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 2,783 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) June 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.
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Intel Core i5-11600K $259Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i7-10700K $277Nvidia RTX 3080 $700Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $94SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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