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 -69%, Mixed -133%, 4K Mixed -104%, SusWrite -78%Peak Score -64%Read -5%, Write -87%, 4K Read -31%, 4K Write -54%, Mixed -119%, 4K Mixed -101%, SusWrite -54%Value & Sentiment -1,379%User Rating -13%, Market Share -2,744%Nice To Haves -90%DQ Read 1%, DQ Write -40%, DQ Mixed -300%, ADQ Read -1%, ADQ Write -68%, ADQ Mixed -259%, Age -33%, AS-SSD Total -19%

Average Bench: 65% (741^st of 1069)

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 74165%

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%

USA-User, 2 days ago.

64GB free

Firmware: EXT49D0Q

SusWrite @10s intervals: 200 226 256 254 256 255 MB/s

63.1% Good

Write 262

Mixed 234

SusWrite 241

65% 291 MB/s

4K Read 15.8

4K Write 23.7

4K Mixed 16.9

58% 18.8 MB/s

DQ Read 348

DQ Write 256

DQ Mixed 75.5

118% 226 MB/s

CAN-User, 1 day ago.

42GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 59 40 34 33 37 34 MB/s

58.7% Above average

Write 41.8

Mixed 98.2

SusWrite 39.5

34% 159 MB/s

4K Read 28.3

4K Write 38.3

4K Mixed 24.8

95% 30.5 MB/s

DQ Read 342

DQ Write 62

DQ Mixed 59.7

80% 155 MB/s

HUN-User, 2 days ago.

106GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 82 63 61 61 56 58 MB/s

57.5% Above average

Write 130

Mixed 139

SusWrite 63.4

43% 196 MB/s

4K Read 21.3

4K Write 42.9

4K Mixed 21.1

82% 28.4 MB/s

DQ Read 356

DQ Write 121

DQ Mixed 74.7

98% 184 MB/s

AUS-User, 1 day ago.

162GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 253 249 254 252 255 243 MB/s

52.8% Above average

Write 264

Mixed 177

SusWrite 251

61% 272 MB/s

4K Read 16.3

4K Write 21.1

4K Mixed 16.2

57% 17.9 MB/s

DQ Read 118

DQ Write 68.8

DQ Mixed 70.9

59% 85.8 MB/s

6,648 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 60,765,647 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 1,287 builds) See popular component choices, score breakdowns and rankings.

Gaming 6%

Tree trunk

Desktop 53%

Yacht

Workstation 6%

Tree trunk

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 54%, 25,413 samples	503x
Core i5-4310UIntelBench 52%, 14,150 samples	457x
Core i5-4300UIntelBench 51%, 39,030 samples	265x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 274,655 samples	1,285x
GTX 780-TiNvidia $410Bench 55%, 32,587 samples	1x
HD Graphics FamilyIncredibleBench 2%, 12 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 65%, 6,648 samples	189x

RAM
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 30,280 samples	86x
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 44,908 samples	54x
M471B5173DB0-YK0 2x4GBSamsungBench 47%, 26,681 samples	51x

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 freeware 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 upgrades.

UserBenchmark of the month

Gaming

Desktop

ProGaming

CPU

GPU

SSD

HDD

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USB

How it works

- 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.
- SkillBench (space shooter) tests user input accuracy.
- Reports are generated and presented on userbenchmark.com.
- Identify the strongest components in your PC.
- See speed test results from other users.
- Compare your components to the current market leaders.
- Explore your best upgrade options with a virtual PC build.
- Compare your in-game FPS to other users with your hardware.

Solid State Drive Rankings (Price vs Performance) November 2022 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.

1069 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 $320	Nvidia RTX 3060-Ti $468	Crucial MX500 250GB $37
Intel Core i7-12700K $329	Nvidia RTX 3070 $450	Samsung 850 Evo 120GB $106
Intel Core i5-12400F $170	Nvidia RTX 3050 $270	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $41	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $50	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $29	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $50	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80	G.SKILL Trident Z DDR4 3200 C14 4x16GB $453	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 65% (741^st of 1069)

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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Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 65% (741st of 1069)

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% (741^st of 1069)