Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (1,826)
MKT (0.1%)
BUILDS
(1)

▲ 514 ▼

Release date ≈ Q2 2014.

128GB 256GB 512GB

Effective Speed -52%Effective Speed -52%Average User Bench -75%Read -11%, Write -99%, 4K Read -52%, 4K Write -64%, Mixed -123%, 4K Mixed -109%, SusWrite -70%Peak Lab Bench -60%Read -4%, Write -86%, 4K Read -27%, 4K Write -39%, Mixed -108%, 4K Mixed -96%, SusWrite -64%Value & Sentiment -989%User Rating -65%, Market Share -1,913%Nice To Haves -93%DQ Read -3%, DQ Write -39%, DQ Mixed -295%, ADQ Read -10%, ADQ Write -61%, ADQ Mixed -280%, Age -33%, AS-SSD Total -20%

Market Leaders

Average Bench: 67.8% (576^th of 980)

Based on 1,826 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 46%Average: 67.8% Great: 86%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 32.1% 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 306MB/s

Avg. 4K Random Read Speed 23.4MB/s

See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.9%. 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 162MB/s

Avg. Sustained Write Speed 188MB/s

Average Bench

(Based on 1,826 samples)

Rank 57667.8%

Min	Avg	Max
325	Read 421	493
54.5	Write 211	262
87.5	Mixed 162	197
46	SusWrite 188	254
54.3% 246 MB/s

Min	Avg	Max
11	4K Read 23.4	34.9
24.7	4K Write 56.9	92.3
14.4	4K Mixed 22.6	30.7
94.5% 34.3 MB/s

Min	Avg	Max
94.4	DQ Read 306	372
54.1	DQ Write 189	257
45.1	DQ Mixed 72.2	84.5
101% 189 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 8 hrs ago.

76GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 72 58 52 57 62 53 MB/s

67.9% Good

Write 98.2

Mixed 128

SusWrite 59.1

41% 191 MB/s

4K Read 34.2

4K Write 59.6

4K Mixed 25.2

116% 39.7 MB/s

DQ Read 359

DQ Write 116

DQ Mixed 54.2

88% 176 MB/s

FRA-User, 12 hrs ago.

45GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 123 100 190 157 67 61 MB/s

67.4% Good

Write 245

Mixed 162

SusWrite 116

54% 245 MB/s

4K Read 25.4

4K Write 53.2

4K Mixed 26.2

100% 34.9 MB/s

DQ Read 358

DQ Write 153

DQ Mixed 73.6

103% 195 MB/s

GBR-User, 1 hr ago.

80GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 184 208 201 193 167 145 MB/s

66.5% Good

Write 247

Mixed 160

SusWrite 183

55% 249 MB/s

4K Read 21.1

4K Write 46.1

4K Mixed 23.3

86% 30.2 MB/s

DQ Read 366

DQ Write 208

DQ Mixed 77.1

114% 217 MB/s

GRC-User, 13 hrs ago.

204GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 245 251 250 254 253 252 MB/s

60% Good

Write 261

Mixed 179

SusWrite 251

60% 266 MB/s

4K Read 10.9

4K Write 27.8

4K Mixed 16.1

52% 18.3 MB/s

DQ Read 353

DQ Write 256

DQ Mixed 76.3

119% 228 MB/s

1,826 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 11,454,160 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 2,443 builds) See popular component choices, score breakdowns and rankings.

Gaming 13%

Tree trunk

Desktop 41%

Speed boat

Workstation 23%

Surfboard

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 41%, 8,702 samples	1,072x
Core i5-4310UIntelBench 38%, 3,570 samples	676x
Core i5-4300UIntelBench 38%, 12,940 samples	577x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 4%, 130,255 samples	2,440x
GTX 1070Nvidia $320Bench 97%, 468,301 samples	1x
GTX 970Nvidia $374Bench 63%, 369,420 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 68%, 1,826 samples	492x

RAM
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 17,493 samples	157x
HMT451S6BFR8A-PB 2x4GBHynixBench 47%, 15,727 samples	117x
HMT41GS6AFR8A-PB 1x8GBHynixBench 28%, 8,692 samples	109x

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.
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- Compare your in-game FPS to other users with your hardware.
- Share your opinion by voting.

Solid State Drive Rankings (Price vs Performance) January 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.

980 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 $360	Nvidia GTX 1070 $320	Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $155	Nvidia GTX 1060-6GB $204	Samsung 850 Evo 500GB $110
Intel Core i5-8600K $260	Nvidia GTX 1080-Ti $808	Samsung 850 Pro 256GB $163

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $45	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 $780	SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $125	SanDisk Extreme 16GB $22

Samsung

PM851 mSATA 256GB

Average Bench: 67.8% (576^th of 980)

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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Samsung

PM851 mSATA 256GB

Average Bench: 67.8% (576th of 980)

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: 67.8% (576^th of 980)