Average Bench: 60.2% (496th of 850)

Based on 369 user benchmarks.  Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Above average average bench

The Samsung PM851 2.5 7mm 256GB averaged 39.7% 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 22.9MB/s
Avg. Sequential Read Speed 477MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 37.3%. 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 25.3MB/s
Avg. Sequential Write Speed 179MB/s
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Average Bench

(Based on 369 samples)
Min Avg Max
358 Read 477 515
36.8 Write 179 260
73.3 Mixed 240 344
65.3% 299 MB/s
Min Avg Max
13.8 4K Read 22.9 29.3
25.8 4K Write 53.6 88.7
7.49 4K Mixed 12.5 16.2
79.1% 29.7 MB/s
Min Avg Max
19.5 DQ Read 193 359
35.6 DQ Write 136 253
9.27 DQ Mixed 25.3 39.5
56.5% 118 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
125GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 491
Write 114
Mixed 218
60% 275 MB/s
4K Read 25.3
4K Write 46.9
4K Mixed 14
81% 28.8 MB/s
DQ Read 288
DQ Write 161
DQ Mixed 34.9
77% 161 MB/s
105GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 493
Write 201
Mixed 297
72% 330 MB/s
4K Read 22.7
4K Write 56.4
4K Mixed 13.4
81% 30.8 MB/s
DQ Read 26.3
DQ Write 168
DQ Mixed 12.8
35% 69 MB/s
79GB free
Firmware: EXT0 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 473
Write 73
Mixed 116
47% 221 MB/s
4K Read 27.4
4K Write 51.2
4K Mixed 15
88% 31.2 MB/s
DQ Read 355
DQ Write 80
DQ Mixed 24.6
68% 153 MB/s
70GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 500
Write 218
Mixed 258
71% 325 MB/s
4K Read 18.2
4K Write 28
4K Mixed 9.73
55% 18.7 MB/s
DQ Read 19.5
DQ Write 33.3
DQ Mixed 9.28
12% 20.7 MB/s
75GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 500
Write 76.1
Mixed 116
49% 231 MB/s
4K Read 25.3
4K Write 50.5
4K Mixed 12
80% 29.3 MB/s
DQ Read 25.1
DQ Write 89.4
DQ Mixed 11.6
22% 42 MB/s
10GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 408
Write 38.5
Mixed 87.1
38% 178 MB/s
4K Read 25.2
4K Write 42.5
4K Mixed 14.9
80% 27.5 MB/s
DQ Read 231
DQ Write 109
DQ Mixed 11.5
51% 117 MB/s
89GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 457
Write 56.4
Mixed 89
43% 201 MB/s
4K Read 18.6
4K Write 37.4
4K Mixed 9.8
60% 21.9 MB/s
DQ Read 218
DQ Write 73.4
DQ Mixed 29.7
52% 107 MB/s
369 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 3,049,338 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 742 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 15%
Tree trunk
Desktop
Desktop 52%
Yacht
Workstation
Workstation 34%
Sail boat

System: Dell Latitude E6540

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good Total price: $249

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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How it works

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Solid State Drive Rankings (Price vs Performance) June 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]

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850 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 $309Nvidia GTX 1070 $382Samsung 850 Evo 250GB $100
Intel Core i5-7600K $231AMD RX 480 $608Samsung 850 Pro 256GB $135
AMD Ryzen 7 1700 $280Nvidia GTX 1060-6GB $248Samsung 850 Evo 500GB $167
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $696SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $40HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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