Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (2,131)
MKT (0.1%)
BUILDS
(1)

▲ 514 ▼

Release date ≈ Q2 2014.

128GB 256GB 512GB

Effective Speed -49%Effective Speed -49%Average User Bench -74%Read -10%, Write -104%, 4K Read -44%, 4K Write -63%, Mixed -124%, 4K Mixed -102%, SusWrite -69%Peak Lab Bench -58%Read -4%, Write -85%, 4K Read -20%, 4K Write -45%, Mixed -106%, 4K Mixed -89%, SusWrite -60%Value & Sentiment -776%User Rating -65%, Market Share -1,487%Nice To Haves -90%DQ Read 1%, DQ Write -38%, DQ Mixed -290%, ADQ Read -7%, ADQ Write -61%, ADQ Mixed -283%, Age -25%, AS-SSD Total -17%

Market Leaders

Average Bench: 67.3% (597^th of 992)

Based on 2,131 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 45%Average: 67.3% Great: 85%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 32.7% 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 305MB/s

Avg. 4K Random Read Speed 23.4MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 40.5%. 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 159MB/s

Avg. Sustained Write Speed 183MB/s

Average Bench

(Based on 2,131 samples)

Rank 59767.3%

Min	Avg	Max
326	Read 420	489
49.7	Write 204	262
84.1	Mixed 159	196
44.3	SusWrite 183	254
53.4% 242 MB/s

Min	Avg	Max
10.9	4K Read 23.4	34.8
25.7	4K Write 56.2	86.8
14.1	4K Mixed 22.5	30.1
94% 34 MB/s

Min	Avg	Max
99.8	DQ Read 305	372
51.7	DQ Write 186	257
41.5	DQ Mixed 71.4	83.9
99.9% 187 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

ESP-User, 1 day ago.

115GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 172 174 170 202 221 207 MB/s

66.2% Good

Write 215

Mixed 152

SusWrite 191

56% 255 MB/s

4K Read 26.5

4K Write 30.4

4K Mixed 23.9

87% 26.9 MB/s

DQ Read 265

DQ Write 159

DQ Mixed 77.2

94% 167 MB/s

USA-User, 2 days ago.

178GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 234 246 252 251 254 228 MB/s

60.1% Good

Write 142

Mixed 139

SusWrite 244

49% 222 MB/s

4K Read 11.6

4K Write 20.2

4K Mixed 27

63% 19.6 MB/s

DQ Read 296

DQ Write 146

DQ Mixed 80.9

98% 175 MB/s

BEL-User, 16 hrs ago.

80GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 83 55 56 60 59 53 MB/s

30.7% Below average

Write 103

Mixed 101

SusWrite 61.1

32% 145 MB/s

4K Read 11.4

4K Write 11.9

4K Mixed 6.6

32% 9.97 MB/s

DQ Read 152

DQ Write 68.9

DQ Mixed 53.2

55% 91.3 MB/s

2,131 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 12,966,448 SSDs tested.

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

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CPU

GPU

SSD

HDD

RAM

MBD

Typical PM851 mSATA 256GB Builds (Compare 2,757 builds) See popular component choices, score breakdowns and rankings.

Gaming 13%

Tree trunk

Desktop 42%

Speed boat

Workstation 23%

Surfboard

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 42%, 10,049 samples	1,221x
Core i5-4310UIntelBench 39%, 4,118 samples	768x
Core i5-4300UIntelBench 37%, 14,647 samples	642x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 4%, 153,820 samples	2,753x
GTX 1070Nvidia $364Bench 98%, 526,975 samples	2x
GTX 970Nvidia $374Bench 63%, 376,689 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 67%, 2,131 samples	553x

RAM
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 19,102 samples	175x
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 16,062 samples	131x
HMT41GS6AFR8A-PB 1x8GBHynixBench 28%, 9,666 samples	125x

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.

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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.
- 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.
- Share your opinion by voting.

Solid State Drive Rankings (Price vs Performance) March 2019 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.

992 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 i7-8700K $370	Nvidia GTX 1070 $364	Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120	Nvidia GTX 1060-6GB $230	Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260	Nvidia GTX 1080-Ti $808	Samsung 850 Pro 256GB $97

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $43	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105	SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85	G.SKILL Trident Z DDR4 3200 C14 4x16GB $761	SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110	SanDisk Ultra Fit 32GB $12

Samsung

PM851 mSATA 256GB

Average Bench: 67.3% (597^th of 992)

Popular builds with this SSD

Above average average bench

Strengths

Average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Latitude E7440

Popular PM851 mSATA 256GB systems:

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Samsung

PM851 mSATA 256GB

Average Bench: 67.3% (597th of 992)

Popular builds with this SSD

Above average average bench

Strengths

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: 67.3% (597^th of 992)