Average Bench: 59.5% (529th of 873)

Based on 1,161 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Average average bench

The Samsung PM851 mSATA 256GB averaged 40.5% 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 23.2MB/s
Avg. Sequential Read Speed 477MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 35.9%. 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 178MB/s
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Average Bench

(Based on 1,161 samples)
Min Avg Max
369 Read 477 509
36.4 Write 178 260
70.7 Mixed 242 345
65.3% 299 MB/s
Min Avg Max
12.1 4K Read 23.2 33
23 4K Write 52.5 81.9
7.81 4K Mixed 12.3 16.1
78.8% 29.3 MB/s
Min Avg Max
17.7 DQ Read 178 360
33.5 DQ Write 126 247
8.88 DQ Mixed 24.6 38.9
52.8% 109 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
70GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 506
Write 205
Mixed 204
66% 305 MB/s
4K Read 34
4K Write 70.2
4K Mixed 14.4
107% 39.6 MB/s
DQ Read 36.4
DQ Write 65.7
DQ Mixed 14.2
21% 38.8 MB/s
74GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 489
Write 119
Mixed 148
54% 252 MB/s
4K Read 28
4K Write 51.3
4K Mixed 15
89% 31.4 MB/s
DQ Read 371
DQ Write 103
DQ Mixed 33.4
78% 169 MB/s
174GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 501
Write 258
Mixed 348
81% 369 MB/s
4K Read 20.7
4K Write 45.6
4K Mixed 11.6
70% 26 MB/s
DQ Read 21.7
DQ Write 228
DQ Mixed 31.6
52% 93.6 MB/s
183GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED S.M.A.R.T
Read 521
Write 124
Mixed 201
61% 282 MB/s
4K Read 32.9
4K Write 1.88
4K Mixed 1.63
53% 12.1 MB/s
14GB free
Firmware: EXT48D0Q Max speed: SATA 3.0 600 MB/s
SYSTEM NCQ 4KALIGNED SSD TRIM S.M.A.R.T
Read 312
Write 32.9
Mixed 71.9
30% 139 MB/s
4K Read 22.4
4K Write 38.9
4K Mixed 6.02
62% 22.4 MB/s
DQ Read 21.9
DQ Write 60.2
DQ Mixed 9.01
16% 30.4 MB/s
1,161 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 4,776,024 SSDs tested.

Typical PM851 mSATA 256GB Builds (Compare 1,085 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

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Popular PM851 mSATA 256GB systems:

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Solid State Drive Rankings (Price vs Performance) December 2017 SSD Rankings.

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873 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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CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $245AMD RX 480 $265Samsung 850 Pro 256GB $110
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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