Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (5,877)
MKT (0%)
BUILDS
(1)

Effective Speed -54%Effective Speed -54%Average Score -82%Read -12%, Write -113%, 4K Read -56%, 4K Write -70%, Mixed -133%, 4K Mixed -109%, SusWrite -80%Peak Score -63%Read -4%, Write -87%, 4K Read -33%, 4K Write -48%, Mixed -116%, 4K Mixed -100%, SusWrite -53%Value & Sentiment -712%User Rating -13%, Market Share -1,411%Nice To Haves -91%DQ Read 1%, DQ Write -40%, DQ Mixed -298%, ADQ Read -4%, ADQ Write -68%, ADQ Mixed -264%, Age -39%, AS-SSD Total -18%

Average Bench: 64.2% (737^th of 1058)

Based on 5,877 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 41%Average: 64.2% Great: 83%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 35.7% 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 312MB/s

Avg. 4K-64Thread Mixed IO Speed 71.5MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 41.7%. 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 155MB/s

Avg. Sustained Write Speed 166MB/s

Average Bench

(Based on 5,877 samples)

Rank 73764.2%

Min	Avg	Max
320	Read 413	487
48	Write 191	260
83.2	Mixed 155	196
40.1	SusWrite 166	252
51.1% 231 MB/s

Min	Avg	Max
10.9	4K Read 22.2	32.4
22.3	4K Write 51.6	80.7
13.6	4K Mixed 21.7	29.1
88.7% 31.8 MB/s

Min	Avg	Max
143	DQ Read 312	372
49.5	DQ Write 171	256
40.5	DQ Mixed 71.5	83.1
98.6% 185 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

GBR-User, 21 hrs ago.

208GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 182 166 245 242 258 258 MB/s

82.8% Excellent

Write 263

Mixed 198

SusWrite 225

65% 293 MB/s

4K Read 28.1

4K Write 72.4

4K Mixed 29.1

118% 43.2 MB/s

DQ Read 361

DQ Write 256

DQ Mixed 84

124% 234 MB/s

FRA-User, 15 hrs ago.

26GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 253 253 253 253 252 252 MB/s

74.8% Very good

Write 259

Mixed 169

SusWrite 253

62% 280 MB/s

4K Read 18.6

4K Write 59.2

4K Mixed 25.6

92% 34.5 MB/s

DQ Read 351

DQ Write 252

DQ Mixed 81.1

120% 228 MB/s

PAK-User, 2 hrs ago.

201GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 235 244 256 245 255 256 MB/s

73.8% Very good

Write 261

Mixed 180

SusWrite 248

62% 281 MB/s

4K Read 20.6

4K Write 52.8

4K Mixed 24.4

90% 32.6 MB/s

DQ Read 361

DQ Write 244

DQ Mixed 77.4

119% 228 MB/s

ROU-User, 1 day ago.

208GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 249 254 185 254 253 253 MB/s

57.3% Above average

Write 259

Mixed 174

SusWrite 241

60% 270 MB/s

4K Read 18.1

4K Write 32.4

4K Mixed 18.1

68% 22.9 MB/s

DQ Read 174

DQ Write 78.4

DQ Mixed 66.9

65% 106 MB/s

5,877 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 49,339,261 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 3,347 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%, 25,499 samples	1,264x
Core i5-4310UIntelBench 53%, 12,966 samples	1,172x
Core i5-4300UIntelBench 51%, 33,815 samples	727x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 276,834 samples	3,337x
HD Graphics 530IntelBench 3%, 2 samples	2x
GTX 1060-6GBNvidia $290Bench 57%, 1,286,087 samples	2x

SSD
PM851 mSATA 256GBSamsungBench 64%, 5,877 samples	512x

RAM
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 39,437 samples	177x
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 43,878 samples	171x
M471B5173DB0-YK0 2x4GBSamsungBench 48%, 28,000 samples	127x

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

RAM

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 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 i5-12600K $300	Nvidia RTX 3070 $500	Crucial MX500 250GB $45
Intel Core i5-11600K $220	Nvidia RTX 3060-Ti $400	Samsung 860 Evo 250GB $52
Intel Core i7-11700K $300	Nvidia RTX 3080 $700	Samsung 850 Evo 120GB $183

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $38	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $63	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $33	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $74	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $71	G.SKILL Trident Z DDR4 3200 C14 4x16GB $649	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 64.2% (737^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

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Samsung

PM851 mSATA 256GB

Average Bench: 64.2% (737th 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: 64.2% (737^th of 1058)