Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (6,648)
MKT (0%)
BUILDS
(1)

Effective Speed -52%Effective Speed -52%Average Score -80%Read -11%, Write -117%, 4K Read -51%, 4K Write -68%, Mixed -133%, 4K Mixed -104%, SusWrite -78%Peak Score -64%Read -5%, Write -87%, 4K Read -31%, 4K Write -53%, Mixed -119%, 4K Mixed -100%, SusWrite -54%Value & Sentiment -868%User Rating -14%, Market Share -1,722%Nice To Haves -89%DQ Read 1%, DQ Write -40%, DQ Mixed -300%, ADQ Read -1%, ADQ Write -68%, ADQ Mixed -259%, Age -27%, AS-SSD Total -19%

Average Bench: 65% (742^nd of 1072)

Based on 6,648 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 43%Average: 65% Great: 83%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 35.0% 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-64Thread Read Speed 323MB/s

Avg. 4K-64Thread Mixed IO Speed 72.4MB/s

See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.6%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 154MB/s

Avg. Sustained Write Speed 167MB/s

Average Bench

(Based on 6,648 samples)

Rank 74265%

Min	Avg	Max
316	Read 412	483
44.6	Write 187	259
81.3	Mixed 154	193
41.5	SusWrite 167	252
50.8% 230 MB/s

Min	Avg	Max
10.9	4K Read 22.7	32.9
23.5	4K Write 52	79.7
13.2	4K Mixed 22.1	29.1
90.2% 32.3 MB/s

Min	Avg	Max
152	DQ Read 323	372
50.1	DQ Write 172	256
48.2	DQ Mixed 72.4	82.9
101% 189 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

The fastest SSD (mainstream) averages a speed of 100%

TUR-User, 7 days ago.

65GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 224 206 216 163 127 214 MB/s

84.6% Excellent

Write 178

Mixed 167

SusWrite 192

57% 259 MB/s

4K Read 29.9

4K Write 100

4K Mixed 30.3

137% 53.4 MB/s

DQ Read 367

DQ Write 164

DQ Mixed 78.8

108% 203 MB/s

IDN-User, 27 days ago.

195GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 240 252 237 251 251 249 MB/s

75.9% Very good

Write 258

Mixed 189

SusWrite 246

62% 279 MB/s

4K Read 28.9

4K Write 56

4K Mixed 25.4

106% 36.8 MB/s

DQ Read 299

DQ Write 240

DQ Mixed 81.5

112% 207 MB/s

KEN-User, 15 days ago.

22GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 189 146 119 104 93 90 MB/s

71.3% Very good

Write 257

Mixed 179

SusWrite 123

55% 247 MB/s

4K Read 29.9

4K Write 72.1

4K Mixed 23.7

114% 41.9 MB/s

DQ Read 341

DQ Write 228

DQ Mixed 83.1

116% 218 MB/s

USA-User, 23 days ago.

32GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 84 59 52 46 44 40 MB/s

63% Good

Write 114

Mixed 126

SusWrite 54.2

39% 180 MB/s

4K Read 29

4K Write 56.5

4K Mixed 25.4

106% 37 MB/s

DQ Read 364

DQ Write 107

DQ Mixed 66.4

93% 179 MB/s

USA-User, 30 days ago.

123GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 132 152 115 117 142 151 MB/s

59.5% Above average

Write 120

Mixed 122

SusWrite 135

42% 192 MB/s

4K Read 21

4K Write 44.5

4K Mixed 21.4

83% 29 MB/s

DQ Read 344

DQ Write 122

DQ Mixed 73.8

96% 180 MB/s

AUS-User, 10 days ago.

120GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 132 204 234 225 206 210 MB/s

56.8% Above average

Write 145

Mixed 154

SusWrite 202

50% 224 MB/s

4K Read 23.7

4K Write 51

4K Mixed 6.1

71% 26.9 MB/s

DQ Read 304

DQ Write 101

DQ Mixed 80.4

91% 162 MB/s

USA-User, 6 days ago.

166GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 169 152 175 155 143 127 MB/s

56.5% Above average

Write 251

Mixed 116

SusWrite 153

53% 240 MB/s

4K Read 23.8

4K Write 47.6

4K Mixed 22.6

90% 31.3 MB/s

DQ Read 32.5

DQ Write 56.6

DQ Mixed 24.8

24% 38 MB/s

IND-User, 8 days ago.

156GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 137 174 176 175 163 176 MB/s

55.3% Above average

Write 106

Mixed 114

SusWrite 167

44% 203 MB/s

4K Read 20.9

4K Write 45.2

4K Mixed 14.2

74% 26.8 MB/s

DQ Read 202

DQ Write 82.3

DQ Mixed 62

67% 115 MB/s

VEN-User, 17 days ago.

65GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 58 46 68 73 53 45 MB/s

49.1% Average

Write 62.5

Mixed 79.9

SusWrite 57.2

32% 147 MB/s

4K Read 15.9

4K Write 44.9

4K Mixed 17.8

71% 26.2 MB/s

DQ Read 327

DQ Write 56.7

DQ Mixed 55.8

76% 146 MB/s

6,648 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,702,887 SSDs tested

Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU

GPU

SSD

HDD

RAM

MBD

Typical PM851 mSATA 256GB Builds (Compare 1,969 builds) See popular component choices, score breakdowns and rankings

Gaming 6%

Tree trunk

Desktop 50%

Yacht

Workstation 6%

Tree trunk

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 49%, 26,548 samples	782x
Core i5-4310UIntelBench 49%, 14,648 samples	682x
Core i5-4300UIntelBench 44%, 36,631 samples	411x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 275,372 samples	1,966x
GTX 780-TiNvidia $410Bench 53%, 30,815 samples	1x
HD Graphics FamilyIncredibleBench 3%, 12 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 65%, 6,648 samples	314x

RAM
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 30,280 samples	120x
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 44,908 samples	76x
M471B5173DB0-YK0 2x4GBSamsungBench 47%, 26,681 samples	72x

EDIT WITH CUSTOM PC BUILDER

Popular PM851 mSATA 256GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute

Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.

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- Download and run UserBenchmark
- CPU tests include: integer, floating and string
- GPU tests include: six 3D game simulations
- Drive tests include: read, write, sustained write and mixed IO
- RAM tests include: single/multi core bandwidth and latency
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- Reports are generated and presented on userbenchmark.com
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Solid State Drive Rankings (Price vs Performance) April 2024 SSD Rankings

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. ^[SSDrivePro]

Group Test Results

Best user rated - User sentiment trumps benchmarks for this comparison.
Best value for money - Value for money is based on real world performance.
Fastest real world speed - Real World Speed measures performance for typical consumers.

1072 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

Storage Devices FAQ

What is sustained sequential write speed?

What’s the difference between SLC, MLC and TLC?

What is 3D XPoint and how fast is it?

What’s the difference between SATA, PCIe and NVMe?

What’s the difference between NAND and V-NAND?

What is sequential write speed?

What is sequential read speed?

What is incompressible data?

What is queue depth?

Solid State Drives

What is the SSD value for money rating?

What is 4K 64 thread write speed?

Can CPU power saving states (C1,C2,C3) impact SSD speed?

What is the effective SSD speed index?

How is the AS SSD write score calculated?

How is the AS SSD read score calculated?

How is the AS SSD total score calculated?

ALL FAQs »

CPU	GPU	SSD
Intel Core i5-13600K $273	Nvidia RTX 4060 $295	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $178	Nvidia RTX 4070 $539	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 65% (742^nd of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Above average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Latitude E7440

Popular PM851 mSATA 256GB systems:

UserBenchmark of the month

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Group Test Results

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Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 65% (742nd of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Above average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Latitude E7440

Popular PM851 mSATA 256GB systems:

UserBenchmark of the month

How it works

Group Test Results

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Comments

Liked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

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Average Bench: 65% (742^nd of 1072)