Average Bench: 60% (505th of 859)

Based on 467 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 40.0% 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 37.8%. 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 177MB/s
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Average Bench

(Based on 467 samples)
Min Avg Max
353 Read 477 515
36.5 Write 177 260
69.8 Mixed 238 345
65% 297 MB/s
Min Avg Max
14.1 4K Read 22.9 29.6
25.5 4K Write 53.7 93.1
7.58 4K Mixed 12.5 16.1
79.2% 29.7 MB/s
Min Avg Max
19.5 DQ Read 187 361
36.9 DQ Write 134 253
9.37 DQ Mixed 24.9 39.3
55.4% 115 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
154GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 514
Write 209
Mixed 262
72% 328 MB/s
4K Read 27.2
4K Write 67.5
4K Mixed 15.9
97% 36.9 MB/s
DQ Read 366
DQ Write 216
DQ Mixed 39
97% 207 MB/s
187GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 495
Write 252
Mixed 346
80% 365 MB/s
4K Read 21.2
4K Write 68.9
4K Mixed 14.2
87% 34.8 MB/s
DQ Read 338
DQ Write 250
DQ Mixed 25
92% 205 MB/s
165GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 513
Write 253
Mixed 326
80% 364 MB/s
4K Read 25
4K Write 54.7
4K Mixed 16
87% 31.9 MB/s
DQ Read 142
DQ Write 121
DQ Mixed 29.9
50% 97.9 MB/s
188GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 507
Write 260
Mixed 342
82% 370 MB/s
4K Read 23.7
4K Write 52.1
4K Mixed 14.9
83% 30.2 MB/s
DQ Read 139
DQ Write 130
DQ Mixed 33.1
53% 101 MB/s
203GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 506
Write 262
Mixed 348
82% 372 MB/s
4K Read 22.5
4K Write 47.8
4K Mixed 14.7
78% 28.4 MB/s
DQ Read 138
DQ Write 124
DQ Mixed 30.8
50% 97.5 MB/s
183GB free
Firmware: EXT08D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 486
Write 257
Mixed 328
79% 357 MB/s
4K Read 19.3
4K Write 51.3
4K Mixed 14
74% 28.2 MB/s
DQ Read 125
DQ Write 115
DQ Mixed 31.6
48% 90.5 MB/s
467 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 256GB Builds (Compare 748 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: 54% - Above average Total price: $450

Popular PM851 2.5 7mm 256GB 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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $299Nvidia GTX 1070 $386Samsung 850 Evo 250GB $95
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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