Average Bench: 60.9% (481st of 848)

Based on 745 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 39.1% 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 Random Read Speed 23.9MB/s
Avg. Sequential Read Speed 478MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 37.8%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 25.1MB/s
Avg. Sequential Write Speed 176MB/s
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Average Bench

(Based on 745 samples)
Min Avg Max
380 Read 478 510
37.7 Write 176 259
76.2 Mixed 243 344
65.4% 299 MB/s
Min Avg Max
12.5 4K Read 23.9 33.4
23.7 4K Write 55.8 89.1
8.12 4K Mixed 12.5 16.4
81.8% 30.7 MB/s
Min Avg Max
19.4 DQ Read 197 365
35.1 DQ Write 133 251
9.28 DQ Mixed 25.1 39
56.5% 118 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
188GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 501
Write 252
Mixed 340
80% 364 MB/s
4K Read 26.2
4K Write 62.4
4K Mixed 12.1
88% 33.6 MB/s
DQ Read 23.7
DQ Write 258
DQ Mixed 10.5
47% 97.5 MB/s
96GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 493
Write 171
Mixed 259
67% 308 MB/s
4K Read 23.5
4K Write 59.6
4K Mixed 13.5
84% 32.2 MB/s
DQ Read 360
DQ Write 177
DQ Mixed 39
90% 192 MB/s
180GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 500
Write 250
Mixed 328
79% 359 MB/s
4K Read 25.7
4K Write 64.5
4K Mixed 11.2
87% 33.8 MB/s
DQ Read 23.4
DQ Write 256
DQ Mixed 12.1
47% 97.3 MB/s
184GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 507
Write 252
Mixed 335
80% 365 MB/s
4K Read 29.4
4K Write 65.3
4K Mixed 10.7
93% 35.1 MB/s
DQ Read 30.3
DQ Write 67.3
DQ Mixed 13.1
20% 36.9 MB/s
175GB free
Firmware: EXT4 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 493
Write 201
Mixed 258
70% 317 MB/s
4K Read 23.1
4K Write 49.4
4K Mixed 14
79% 28.8 MB/s
DQ Read 188
DQ Write 114
DQ Mixed 35.2
57% 112 MB/s
149GB free
Firmware: EXT4 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 502
Write 89.8
Mixed 178
55% 257 MB/s
4K Read 24.4
4K Write 49.1
4K Mixed 12.9
80% 28.8 MB/s
DQ Read 291
DQ Write 64.8
DQ Mixed 20.7
56% 126 MB/s
745 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,595,267 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 789 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:

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Solid State Drive Rankings (Price vs Performance) April 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

848 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 i7-7700K $310Nvidia GTX 1070 $330Samsung 850 Evo 250GB $106
Intel Core i5-7600K $229AMD RX 480 $217Samsung 850 Pro 256GB $140
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $219Samsung 850 Evo 500GB $170
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $122SanDisk Extreme 64GB $35
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $137SanDisk Ultra Fit 32GB $9
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