Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (4,865)
MKT (0%)
BUILDS
(1)

Effective Speed -52%Effective Speed -52%Average Score -82%Read -12%, Write -119%, 4K Read -53%, 4K Write -66%, Mixed -137%, 4K Mixed -106%, SusWrite -80%Peak Score -61%Read -3%, Write -86%, 4K Read -26%, 4K Write -44%, Mixed -118%, 4K Mixed -96%, SusWrite -53%Value & Sentiment -859%User Rating -13%, Market Share -1,706%Nice To Haves -90%DQ Read 2%, DQ Write -39%, DQ Mixed -295%, ADQ Read 1%, ADQ Write -66%, ADQ Mixed -263%, Age -44%, AS-SSD Total -17%

Average Bench: 65.3% (723^rd of 1058)

Based on 4,865 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 45%Average: 65.3% Great: 85%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 34.6% 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 325MB/s

Avg. 4K-64Thread Mixed IO Speed 72.5MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 40.2%. 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 169MB/s

Average Bench

(Based on 4,865 samples)

Rank 72365.3%

Min	Avg	Max
314	Read 414	490
47.2	Write 187	261
76	Mixed 154	195
39	SusWrite 169	253
51% 231 MB/s

Min	Avg	Max
11.2	4K Read 22.6	34.1
21	4K Write 52.7	83
13.3	4K Mixed 22.1	29.8
90.4% 32.5 MB/s

Min	Avg	Max
153	DQ Read 325	373
47.1	DQ Write 174	257
47.3	DQ Mixed 72.5	83.8
101% 190 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

FRA-User, 23 hrs ago.

184GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 241 213 244 238 252 253 MB/s

68.1% Good

Write 263

Mixed 180

SusWrite 240

59% 263 MB/s

4K Read 19.3

4K Write 60.4

4K Mixed 19.8

87% 33.2 MB/s

DQ Read 309

DQ Write 258

DQ Mixed 68.9

110% 212 MB/s

USA-User, 23 hrs ago.

102GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 144 126 163 185 189 193 MB/s

55.4% Above average

Write 195

Mixed 160

SusWrite 167

47% 213 MB/s

4K Read 10

4K Write 33.7

4K Mixed 21.6

61% 21.8 MB/s

DQ Read 365

DQ Write 202

DQ Mixed 77.5

113% 215 MB/s

GEO-User, 1 day ago.

13GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 48 38 36 35 34 35 MB/s

54.4% Above average

Write 51.6

Mixed 97.5

SusWrite 37.7

30% 142 MB/s

4K Read 22.5

4K Write 45.5

4K Mixed 24.7

90% 30.9 MB/s

DQ Read 373

DQ Write 42.1

DQ Mixed 62.5

82% 159 MB/s

USA-User, 13 hrs ago.

207GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 186 218 176 180 191 215 MB/s

54.1% Above average

Write 211

Mixed 158

SusWrite 194

50% 226 MB/s

4K Read 10.6

4K Write 39.2

4K Mixed 14.2

55% 21.3 MB/s

DQ Read 293

DQ Write 240

DQ Mixed 80

111% 204 MB/s

4,865 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 41,718,125 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 2,495 builds) See popular component choices, score breakdowns and rankings.

Gaming 5%

Tree trunk

Desktop 53%

Yacht

Workstation 4%

Tree trunk

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 54%, 21,129 samples	954x
Core i5-4310UIntelBench 52%, 10,975 samples	877x
Core i5-4300UIntelBench 52%, 29,546 samples	542x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 225,880 samples	2,485x
HD Graphics 530IntelBench 3%, 2 samples	2x
GTX 1060-6GBNvidia $290Bench 57%, 1,119,893 samples	2x

SSD
PM851 mSATA 256GBSamsungBench 65%, 4,865 samples	382x

RAM
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 36,723 samples	134x
HMT451S6BFR8A-PB 2x4GBHynixBench 47%, 33,874 samples	122x
M471B5173DB0-YK0 2x4GBSamsungBench 47%, 23,841 samples	99x

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

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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) April 2021 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.

1058 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 i5-11400F $173	Nvidia RTX 3070 $500	Crucial MX500 250GB $48
Intel Core i5-11600K $265	Nvidia RTX 3060-Ti $400	Samsung 850 Evo 120GB $78
Intel Core i7-10700K $316	Nvidia GTX 1660S (Super) $240	Samsung 860 Evo 250GB $50

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $40	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $73	SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85	G.SKILL Trident Z DDR4 3200 C14 4x16GB $649	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 65.3% (723^rd of 1058)

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

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Samsung

PM851 mSATA 256GB

Average Bench: 65.3% (723rd of 1058)

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

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Average Bench: 65.3% (723^rd of 1058)