Average Bench: 50.8% (626th of 859)

Based on 265 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 128GB

Average average bench

The Samsung PM851 2.5 7mm 128GB averaged 49.2% 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 463MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 128GB is 24.6%. 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 96.5MB/s
Avg. 4K-64Thread Mixed IO Speed 22.3MB/s
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Average Bench

(Based on 265 samples)
Min Avg Max
359 Read 463 497
25.9 Write 96.5 135
48.6 Mixed 145 214
50.6% 235 MB/s
Min Avg Max
15.4 4K Read 21.1 27.5
24.4 4K Write 46.4 78.4
7.05 4K Mixed 10.7 13.3
70.2% 26.1 MB/s
Min Avg Max
19.5 DQ Read 182 353
33.8 DQ Write 89.7 138
8.67 DQ Mixed 22.3 33.3
46.9% 98.2 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
75GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 125
Mixed 182
58% 268 MB/s
4K Read 28.3
4K Write 77.5
4K Mixed 12
99% 39.3 MB/s
DQ Read 258
DQ Write 121
DQ Mixed 31
65% 137 MB/s
38GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 124
Mixed 182
58% 267 MB/s
4K Read 24.3
4K Write 61.3
4K Mixed 13.3
86% 33 MB/s
DQ Read 323
DQ Write 139
DQ Mixed 34.4
78% 165 MB/s
48GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 478
Write 132
Mixed 186
58% 265 MB/s
4K Read 23.2
4K Write 65.7
4K Mixed 8.98
81% 32.6 MB/s
DQ Read 19.3
DQ Write 119
DQ Mixed 28.4
34% 55.7 MB/s
51GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 499
Write 97.8
Mixed 156
54% 251 MB/s
4K Read 23.7
4K Write 56
4K Mixed 11.4
80% 30.3 MB/s
DQ Read 25.8
DQ Write 77.2
DQ Mixed 12.1
21% 38.4 MB/s
30GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 487
Write 66.7
Mixed 67.7
44% 207 MB/s
4K Read 23.3
4K Write 39.9
4K Mixed 9.66
69% 24.3 MB/s
DQ Read 25.2
DQ Write 62.6
DQ Mixed 26.1
25% 38 MB/s
30GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 477
Write 39.3
Mixed 65.5
41% 194 MB/s
4K Read 18.1
4K Write 28.8
4K Mixed 10.7
56% 19.2 MB/s
DQ Read 247
DQ Write 31.6
DQ Mixed 24.6
47% 101 MB/s
9GB free
Firmware: EXT07D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 491
Write 74
Mixed 98.8
47% 221 MB/s
4K Read 16
4K Write 27.6
4K Mixed 8.45
50% 17.4 MB/s
DQ Read 16.5
DQ Write 28.1
DQ Mixed 8.16
10% 17.6 MB/s
11GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 460
Write 44.5
Mixed 93.5
42% 199 MB/s
4K Read 13
4K Write 21.7
4K Mixed 7.33
40% 14 MB/s
DQ Read 87.4
DQ Write 23
DQ Mixed 15.4
22% 41.9 MB/s
265 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 4,139,020 SSDs tested.

Typical PM851 2.5 7mm 128GB Builds (Compare 932 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 104%
UFO
Desktop
Desktop 71%
Battleship
Workstation
Workstation 71%
Battleship

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 90% - Excellent Total price: $926

Popular PM851 2.5 7mm 128GB systems:

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Solid State Drive Rankings (Price vs Performance) October 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]

 Comments

859 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 $280AMD RX 480 $508Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $265Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $158SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $920SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $67Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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