Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (5,580)
MKT (0%)
BUILDS
(1)

Effective Speed -53%Effective Speed -53%Average Score -80%Read -11%, Write -110%, 4K Read -56%, 4K Write -66%, Mixed -132%, 4K Mixed -108%, SusWrite -77%Peak Score -61%Read -4%, Write -87%, 4K Read -26%, 4K Write -42%, Mixed -116%, 4K Mixed -98%, SusWrite -53%Value & Sentiment -734%User Rating -13%, Market Share -1,456%Nice To Haves -90%DQ Read 1%, DQ Write -40%, DQ Mixed -298%, ADQ Read -2%, ADQ Write -64%, ADQ Mixed -260%, Age -40%, AS-SSD Total -17%

Average Bench: 65% (725^th of 1058)

Based on 5,580 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 42%Average: 65% Great: 84%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 34.9% 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 316MB/s

Avg. 4K-64Thread Mixed IO Speed 72.2MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 41.4%. 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 156MB/s

Avg. Sustained Write Speed 170MB/s

Average Bench

(Based on 5,580 samples)

Rank 72565%

Min	Avg	Max
323	Read 416	487
46.2	Write 193	260
81.8	Mixed 156	196
40.6	SusWrite 170	252
51.6% 234 MB/s

Min	Avg	Max
11.2	4K Read 22.3	34.1
22.7	4K Write 52.8	84.3
13.1	4K Mixed 21.9	29.4
89.8% 32.3 MB/s

Min	Avg	Max
148	DQ Read 316	372
49.3	DQ Write 175	256
40.8	DQ Mixed 72.2	83.1
100% 188 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

SRB-User, 2 days ago.

196GB free (System drive)

Firmware: 8D0Q

SusWrite @10s intervals: 257 255 254 255 255 255 MB/s

84.1% Excellent

Write 261

Mixed 194

SusWrite 255

63% 283 MB/s

4K Read 28.1

4K Write 93.8

4K Mixed 27.2

127% 49.7 MB/s

DQ Read 362

DQ Write 251

DQ Mixed 82

122% 232 MB/s

USA-User, 1 hr ago.

204GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 207 239 251 227 206 201 MB/s

80.5% Excellent

Write 259

Mixed 205

SusWrite 222

62% 280 MB/s

4K Read 28.3

4K Write 80.3

4K Mixed 26.8

120% 45.1 MB/s

DQ Read 362

DQ Write 255

DQ Mixed 83.3

123% 233 MB/s

ITA-User, 1 day ago.

208GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 236 251 254 252 254 254 MB/s

80% Very good

Write 258

Mixed 181

SusWrite 250

62% 281 MB/s

4K Read 27.7

4K Write 68.1

4K Mixed 25.7

111% 40.5 MB/s

DQ Read 373

DQ Write 257

DQ Mixed 82.2

124% 237 MB/s

VNM-User, 5 hrs ago.

102GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 137 61 50 194 216 182 MB/s

60.5% Good

Write 80.5

Mixed 99.2

SusWrite 140

40% 184 MB/s

4K Read 23.3

4K Write 41.1

4K Mixed 21.7

85% 28.7 MB/s

DQ Read 353

DQ Write 73.4

DQ Mixed 73.1

90% 166 MB/s

MNG-User, 1 day ago.

8GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 38 30 31 31 27 32 MB/s

43.7% Average

Write 68

Mixed 76.7

SusWrite 31.4

29% 133 MB/s

4K Read 15

4K Write 34.9

4K Mixed 17.5

64% 22.5 MB/s

DQ Read 317

DQ Write 43.6

DQ Mixed 36.3

63% 132 MB/s

5,580 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,061,766 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 3,099 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%, 23,624 samples	1,175x
Core i5-4310UIntelBench 52%, 11,912 samples	1,082x
Core i5-4300UIntelBench 51%, 33,926 samples	673x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 267,089 samples	3,089x
HD Graphics 530IntelBench 3%, 2 samples	2x
GTX 1060-6GBNvidia $290Bench 57%, 1,230,572 samples	2x

SSD
PM851 mSATA 256GBSamsungBench 65%, 5,580 samples	484x

RAM
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 42,060 samples	162x
HMT451S6BFR8A-PB 2x4GBHynixBench 47%, 36,165 samples	154x
M471B5173DB0-YK0 2x4GBSamsungBench 48%, 27,991 samples	118x

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) September 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 i5-11600K $270	Nvidia RTX 3060-Ti $400	Crucial MX500 250GB $45
Intel Core i5-11400F $260	Nvidia RTX 3070 $500	Samsung 850 Evo 120GB $183
Intel Core i7-11700K $346	Nvidia GTX 1660S (Super) $240	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $40	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80	G.SKILL Trident Z DDR4 3200 C14 4x16GB $649	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 65% (725^th 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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Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 65% (725th 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

Best User Rated

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Average Bench: 65% (725^th of 1058)