Average Bench: 59.7% (521st of 873)

Based on 543 user benchmarks.  Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Average average bench

The Samsung PM851 2.5 7mm 256GB averaged 40.3% 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 22.8MB/s
Avg. Sequential Read Speed 478MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 37.5%. This is a relatively wide range which indicates that the Samsung PM851 2.5 7mm 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 24.9MB/s
Avg. Sequential Write Speed 174MB/s
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Average Bench

(Based on 543 samples)
Min Avg Max
359 Read 478 514
36.4 Write 174 260
70.9 Mixed 237 345
64.8% 296 MB/s
Min Avg Max
14.4 4K Read 22.8 29.4
25.4 4K Write 53.3 92.9
7.72 4K Mixed 12.4 16
78.7% 29.5 MB/s
Min Avg Max
18.9 DQ Read 186 360
36.3 DQ Write 133 252
9.36 DQ Mixed 24.9 39.3
55% 115 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
81GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 489
Write 250
Mixed 280
75% 340 MB/s
4K Read 26.3
4K Write 56.7
4K Mixed 14.6
89% 32.6 MB/s
DQ Read 246
DQ Write 183
DQ Mixed 37.1
76% 155 MB/s
118GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 492
Write 145
Mixed 234
63% 290 MB/s
4K Read 25.5
4K Write 76.9
4K Mixed 13.9
97% 38.7 MB/s
DQ Read 344
DQ Write 180
DQ Mixed 38.3
88% 187 MB/s
150GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 506
Write 222
Mixed 312
76% 347 MB/s
4K Read 26
4K Write 67.6
4K Mixed 13.7
93% 35.8 MB/s
DQ Read 28.2
DQ Write 216
DQ Mixed 13.3
42% 85.9 MB/s
176GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 507
Write 256
Mixed 347
82% 370 MB/s
4K Read 17
4K Write 37.4
4K Mixed 12.8
62% 22.4 MB/s
DQ Read 223
DQ Write 187
DQ Mixed 38.5
74% 149 MB/s
161GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 505
Write 255
Mixed 336
80% 365 MB/s
4K Read 20.5
4K Write 55.7
4K Mixed 11.9
76% 29.4 MB/s
DQ Read 22.3
DQ Write 58.8
DQ Mixed 12
17% 31.1 MB/s
96GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 502
Write 121
Mixed 205
60% 276 MB/s
4K Read 27.6
4K Write 70.7
4K Mixed 13.9
97% 37.4 MB/s
DQ Read 29.2
DQ Write 67
DQ Mixed 13.4
20% 36.5 MB/s
59GB free
Firmware: EXT0 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 424
Write 43.5
Mixed 97.2
40% 188 MB/s
4K Read 17.5
4K Write 33.6
4K Mixed 9.22
56% 20.1 MB/s
DQ Read 326
DQ Write 51.8
DQ Mixed 30.6
63% 136 MB/s
543 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 5,236,153 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 1,085 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 14%
Tree trunk
Desktop
Desktop 52%
Yacht
Workstation
Workstation 34%
Sail boat

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 52% - Above average Total price: $500

Popular PM851 2.5 7mm 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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Solid State Drive Rankings (Price vs Performance) January 2018 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]

 Comments

873 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

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AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
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Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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