Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (6,637)
MKT (0%)
BUILDS
(1)

Effective Speed -49%Effective Speed -49%Average Score -77%Read -11%, Write -113%, 4K Read -49%, 4K Write -68%, Mixed -125%, 4K Mixed -98%, SusWrite -72%Peak Score -62%Read -5%, Write -87%, 4K Read -28%, 4K Write -52%, Mixed -115%, 4K Mixed -96%, SusWrite -48%Value & Sentiment -573%User Rating -13%, Market Share -1,133%Nice To Haves -85%DQ Read 1%, DQ Write -38%, DQ Mixed -282%, ADQ Read -1%, ADQ Write -65%, ADQ Mixed -244%, Age -34%, AS-SSD Total -18%

Average Bench: 64.5% (735^th of 1058)

Based on 6,637 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 43%Average: 64.5% Great: 82%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 35.4% 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 322MB/s

Avg. 4K-64Thread Mixed IO Speed 71.9MB/s

See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.2%. 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 165MB/s

Average Bench

(Based on 6,637 samples)

Rank 73564.5%

Min	Avg	Max
315	Read 412	485
46.8	Write 189	259
84.9	Mixed 154	192
42	SusWrite 165	252
50.8% 230 MB/s

Min	Avg	Max
10.8	4K Read 22.4	32.7
23.5	4K Write 51.4	79.5
13.7	4K Mixed 21.9	28.8
89.2% 31.9 MB/s

Min	Avg	Max
155	DQ Read 322	372
51.5	DQ Write 171	256
46.9	DQ Mixed 71.9	83.1
100% 188 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 10 hrs ago.

175GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 213 201 240 236 238 245 MB/s

66.4% Good

Write 246

Mixed 167

SusWrite 229

55% 247 MB/s

4K Read 18.1

4K Write 68.1

4K Mixed 18.9

88% 35 MB/s

DQ Read 321

DQ Write 234

DQ Mixed 66.1

107% 207 MB/s

TUR-User, 2 days ago.

203GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 161 151 134 138 108 127 MB/s

63% Good

Write 177

Mixed 158

SusWrite 136

50% 225 MB/s

4K Read 18.7

4K Write 48

4K Mixed 23.4

84% 30 MB/s

DQ Read 365

DQ Write 160

DQ Mixed 78.2

107% 201 MB/s

GBR-User, 1 day ago.

183GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 220 212 243 248 244 252 MB/s

59.2% Above average

Write 257

Mixed 186

SusWrite 236

60% 267 MB/s

4K Read 14

4K Write 31.4

4K Mixed 16.3

59% 20.6 MB/s

DQ Read 287

DQ Write 214

DQ Mixed 77.6

105% 193 MB/s

USA-User, 1 day ago.

81GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 63 50 50 52 48 47 MB/s

57.4% Above average

Write 73.4

Mixed 105

SusWrite 51.7

35% 163 MB/s

4K Read 24.5

4K Write 47

4K Mixed 23.4

92% 31.6 MB/s

DQ Read 352

DQ Write 69.1

DQ Mixed 58.4

82% 160 MB/s

USA-User, 20 hrs ago.

90GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 240 150 144 99 86 77 MB/s

48.3% Average

Write 259

Mixed 179

SusWrite 133

52% 235 MB/s

4K Read 15.9

4K Write 25.8

4K Mixed 16.6

59% 19.4 MB/s

DQ Read 191

DQ Write 132

DQ Mixed 69.6

77% 131 MB/s

NLD-User, 20 hrs ago.

189GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 41 27 34 37 40 32 MB/s

46% Average

Write 55

Mixed 118

SusWrite 35.3

31% 142 MB/s

4K Read 21.8

4K Write 37.6

4K Mixed 18.9

77% 26.1 MB/s

DQ Read 249

DQ Write 18

DQ Mixed 54.3

60% 107 MB/s

6,637 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 56,071,775 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 3,960 builds) See popular component choices, score breakdowns and rankings.

Gaming 6%

Tree trunk

Desktop 54%

Yacht

Workstation 6%

Tree trunk

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 55%, 24,432 samples	1,505x
Core i5-4310UIntelBench 53%, 13,287 samples	1,386x
Core i5-4300UIntelBench 52%, 36,417 samples	855x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 296,073 samples	3,948x
HD Graphics 530IntelBench 3%, 2 samples	2x
GTX 1060-6GBNvidia $290Bench 57%, 1,449,936 samples	2x

SSD
PM851 mSATA 256GBSamsungBench 65%, 6,637 samples	606x

RAM
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 39,017 samples	213x
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 44,507 samples	198x
M471B5173DB0-YK0 2x4GBSamsungBench 48%, 27,649 samples	151x

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) June 2022 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 $280	Nvidia RTX 3060-Ti $400	Crucial MX500 250GB $45
Intel Core i5-12400F $170	Nvidia RTX 3070 $500	Samsung 850 Evo 120GB $111
Intel Core i7-12700K $380	Nvidia RTX 3050 $250	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $33	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $68	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $71	G.SKILL Trident Z DDR4 3200 C14 4x16GB $470	SanDisk Ultra Fit 32GB $16

Samsung

PM851 mSATA 256GB

Average Bench: 64.5% (735^th of 1058)

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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Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 64.5% (735th of 1058)

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

Share a related link

Comments

Liked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

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Average Bench: 64.5% (735^th of 1058)