Average Bench: 50.6% (625th of 857)

Based on 239 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 128GB

Average average bench

The Samsung PM851 2.5 7mm 128GB averaged 49.3% 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 21.1MB/s
Avg. Sequential Read Speed 461MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 128GB is 24.4%. This is a relatively narrow range which indicates that the Samsung PM851 2.5 7mm 128GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Sequential Write Speed 96.3MB/s
Avg. 4K-64Thread Mixed IO Speed 22.1MB/s
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Average Bench

(Based on 239 samples)
Min Avg Max
358 Read 461 497
25.9 Write 96.3 135
47.9 Mixed 145 214
50.4% 234 MB/s
Min Avg Max
14.8 4K Read 21.1 27.5
24.4 4K Write 46.5 78.8
7.31 4K Mixed 10.7 13.2
70.3% 26.1 MB/s
Min Avg Max
19.6 DQ Read 181 354
34 DQ Write 89.4 138
8.69 DQ Mixed 22.1 33.3
46.5% 97.4 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
117GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 496
Write 136
Mixed 131
55% 254 MB/s
4K Read 30
4K Write 98
4K Mixed 12.9
114% 47 MB/s
DQ Read 260
DQ Write 137
DQ Mixed 31
68% 142 MB/s
118GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 492
Write 135
Mixed 215
61% 281 MB/s
4K Read 26.7
4K Write 58.8
4K Mixed 12.8
88% 32.7 MB/s
DQ Read 358
DQ Write 102
DQ Mixed 33.8
76% 165 MB/s
74GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 484
Write 136
Mixed 209
60% 276 MB/s
4K Read 18.5
4K Write 84.5
4K Mixed 9.69
85% 37.6 MB/s
DQ Read 355
DQ Write 137
DQ Mixed 8.45
69% 167 MB/s
119GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 480
Write 124
Mixed 203
58% 269 MB/s
4K Read 16.7
4K Write 37.7
4K Mixed 10.5
59% 21.6 MB/s
DQ Read 254
DQ Write 122
DQ Mixed 25.5
62% 134 MB/s
55GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 485
Write 133
Mixed 210
60% 276 MB/s
4K Read 19.4
4K Write 54.5
4K Mixed 10.2
71% 28.1 MB/s
DQ Read 63.6
DQ Write 111
DQ Mixed 32.6
40% 69.1 MB/s
4GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 461
Write 33
Mixed 53.1
38% 183 MB/s
4K Read 22.6
4K Write 34.5
4K Mixed 10.6
66% 22.6 MB/s
DQ Read 320
DQ Write 57.1
DQ Mixed 11.3
54% 129 MB/s
239 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 3,541,596 SSDs tested.

Typical PM851 2.5 7mm 128GB Builds (Compare 992 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 71%
Battleship
Desktop
Desktop 67%
Battle cruiser
Workstation
Workstation 64%
Destroyer

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good Total price: $874

Popular PM851 2.5 7mm 128GB systems:

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Solid State Drive Rankings (Price vs Performance) August 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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857 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 $300Nvidia GTX 1070 $367Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $120
Intel Core i5-7600K $212Nvidia GTX 1060-6GB $280Samsung 850 Evo 500GB $165
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $718SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $57HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
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