Average Bench: 59.8% (505th of 857)

Based on 916 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Average average bench

The Samsung PM851 mSATA 256GB averaged 40.2% 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 23.4MB/s
Avg. Sequential Read Speed 476MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 36.6%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Mixed IO Speed 24.6MB/s
Avg. Sequential Write Speed 173MB/s
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Average Bench

(Based on 916 samples)
Min Avg Max
360 Read 476 509
37.3 Write 173 259
77.3 Mixed 240 344
64.8% 296 MB/s
Min Avg Max
12.2 4K Read 23.4 32.7
23 4K Write 53.9 86.1
7.86 4K Mixed 12.4 16.2
79.8% 29.9 MB/s
Min Avg Max
18.5 DQ Read 190 364
33.4 DQ Write 127 248
8.95 DQ Mixed 24.6 39
54.6% 114 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
215GB free
Firmware: EXT4AD0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 490
Write 248
Mixed 334
79% 357 MB/s
4K Read 17.3
4K Write 75.1
4K Mixed 15.7
86% 36 MB/s
DQ Read 197
DQ Write 182
DQ Mixed 34.7
68% 138 MB/s
124GB free
Firmware: EXT4AD0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 498
Write 167
Mixed 206
63% 290 MB/s
4K Read 23.4
4K Write 52.2
4K Mixed 14.3
82% 30 MB/s
DQ Read 348
DQ Write 217
DQ Mixed 39.9
95% 202 MB/s
185GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 451
Write 232
Mixed 312
73% 332 MB/s
4K Read 26.3
4K Write 54.5
4K Mixed 13.1
86% 31.3 MB/s
DQ Read 195
DQ Write 198
DQ Mixed 31.8
69% 142 MB/s
183GB free
Firmware: EXT4 Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 191
Mixed 251
68% 313 MB/s
4K Read 25.8
4K Write 51.8
4K Mixed 12.8
83% 30.1 MB/s
DQ Read 272
DQ Write 158
DQ Mixed 35.4
74% 155 MB/s
192GB free
Firmware: EXT4AD0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 484
Write 122
Mixed 203
58% 270 MB/s
4K Read 26.7
4K Write 63.6
4K Mixed 12.4
90% 34.2 MB/s
DQ Read 261
DQ Write 176
DQ Mixed 32.1
74% 156 MB/s
43GB free
Firmware: EXT4AD0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 489
Write 157
Mixed 241
65% 296 MB/s
4K Read 17
4K Write 30.5
4K Mixed 12.4
58% 20 MB/s
DQ Read 339
DQ Write 164
DQ Mixed 34.5
83% 179 MB/s
68GB free
Firmware: EXT49D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 497
Write 110
Mixed 190
58% 266 MB/s
4K Read 21.8
4K Write 41.9
4K Mixed 9.67
68% 24.4 MB/s
DQ Read 247
DQ Write 138
DQ Mixed 9.67
56% 132 MB/s
916 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 3,517,083 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 1,063 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 13%
Tree trunk
Desktop
Desktop 41%
Speed boat
Workstation
Workstation 23%
Surfboard

System: Dell Latitude E7440

EDIT WITH CUSTOM PC BUILDER

Popular PM851 mSATA 256GB systems:

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 Comments

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 $410Samsung 850 Evo 250GB $99
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $133
Intel Core i5-7600K $212Nvidia GTX 1060-6GB $271Samsung 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) $83Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
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