Today's hottest

Amazon Ebay

deals

CPU GPU SSD HDD USB RAM MBD

TEST
YOUR SSD

ADD TO PC
BUILD

Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (6,648)
MKT (0%)
BUILDS
(1)

Effective Speed -739%Effective Speed -739%Average Score -1,156%Read -917%, Write -2,398%, 4K Read -287%, 4K Write -299%, Mixed -2,001%, 4K Mixed -400%, SusWrite -1,794%Peak Score -1,294%Read -1,130%, Write -2,385%, 4K Read -473%, 4K Write -375%, Mixed -2,326%, 4K Mixed -648%, SusWrite -1,717%Value & Sentiment -2,674%User Rating -37%, Market Share -5,311%Nice To Haves -974%DQ Read -524%, DQ Write -642%, DQ Mixed -2,433%, ADQ Read -430%, ADQ Write -629%, ADQ Mixed -1,950%, Age -548%, AS-SSD Total -635%

Average Bench: 65% (750^th of 1080)

Based on 6,648 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 43%Average: 65% Great: 83%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 35.0% 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 323MB/s

Avg. 4K-64Thread Mixed IO Speed 72.4MB/s

See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.6%. 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 167MB/s

Average Bench

(Based on 6,648 samples)

Rank 75065%

Min	Avg	Max
316	Read 412	483
44.6	Write 187	259
81.3	Mixed 154	193
41.5	SusWrite 167	252
50.8% 230 MB/s

Min	Avg	Max
10.9	4K Read 22.7	32.9
23.5	4K Write 52	79.7
13.2	4K Mixed 22.1	29.1
90.2% 32.3 MB/s

Min	Avg	Max
152	DQ Read 323	372
50.1	DQ Write 172	256
48.2	DQ Mixed 72.4	82.9
101% 189 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 17 days ago.

176GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 206 239 242 251 251 250 MB/s

74.7% Very good

Write 253

Mixed 182

SusWrite 240

63% 283 MB/s

4K Read 24.2

4K Write 51.2

4K Mixed 24.1

95% 33.2 MB/s

DQ Read 349

DQ Write 235

DQ Mixed 82.4

118% 222 MB/s

ITA-User, 20 days ago.

124GB free (System drive)

Firmware: AD0Q

SusWrite @10s intervals: 184 228 242 166 100 184 MB/s

72% Very good

Write 150

Mixed 153

SusWrite 184

49% 224 MB/s

4K Read 25.6

4K Write 66.9

4K Mixed 26.4

108% 39.6 MB/s

DQ Read 374

DQ Write 151

DQ Mixed 73.1

104% 199 MB/s

PRT-User, 3 days ago.

201GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 211 227 233 221 240 232 MB/s

71.5% Very good

Write 194

Mixed 150

SusWrite 227

57% 257 MB/s

4K Read 22.5

4K Write 52.1

4K Mixed 23

91% 32.5 MB/s

DQ Read 293

DQ Write 226

DQ Mixed 81.4

109% 200 MB/s

ESP-User, 12 days ago.

228GB free

Firmware: EXT4AD0Q

SusWrite @10s intervals: 249 252 253 252 252 251 MB/s

63.8% Good

Write 258

Mixed 177

SusWrite 252

57% 253 MB/s

4K Read 16.7

4K Write 38.2

4K Mixed 21.5

73% 25.5 MB/s

DQ Read 324

DQ Write 253

DQ Mixed 78.2

116% 218 MB/s

USA-User, 16 days ago.

152GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 228 192 163 236 172 203 MB/s

55.6% Above average

Write 244

Mixed 161

SusWrite 199

60% 271 MB/s

4K Read 9.3

4K Write 33.3

4K Mixed 15.4

52% 19.3 MB/s

DQ Read 208

DQ Write 160

DQ Mixed 61.9

80% 143 MB/s

USA-User, 5 days ago.

13GB free (System drive)

Firmware: EXT49D0Q

SusWrite @10s intervals: 37 24 28 36 32 31 MB/s

44.5% Average

Write 40

Mixed 71.1

SusWrite 31.3

25% 118 MB/s

4K Read 10.3

4K Write 35

4K Mixed 23.5

64% 22.9 MB/s

DQ Read 349

DQ Write 41.4

DQ Mixed 57

77% 149 MB/s

6,648 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 77,603,586 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 2,014 builds) See popular component choices, score breakdowns and rankings

Gaming 6%

Tree trunk

Desktop 50%

Yacht

Workstation 6%

Tree trunk

System: Dell Latitude E7440

CPU
Core i7-4600UIntelBench 49%, 26,548 samples	803x
Core i5-4310UIntelBench 49%, 14,648 samples	698x
Core i5-4300UIntelBench 44%, 36,631 samples	416x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 275,372 samples	2,011x
GTX 780-TiNvidia $410Bench 53%, 30,815 samples	1x
HD Graphics FamilyIncredibleBench 3%, 12 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 65%, 6,648 samples	318x

RAM
HMT451S6BFR8A-PB 2x4GBHynixBench 48%, 30,280 samples	124x
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 44,908 samples	79x
M471B5173DB0-YK0 2x4GBSamsungBench 47%, 26,681 samples	72x

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 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 value for money 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 2024 SSD Rankings

Welcome to our 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.

1080 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 i5-13600K $210	Nvidia RTX 4060 $285	WD Black SN850X M.2 2TB $125
Intel Core i5-12600K $160	Nvidia RTX 4060-Ti $389	WD Black SN850X M.2 1TB $80
Intel Core i5-12400F $111	Nvidia RTX 4070 $500	Crucial T700 M.2 4TB $330

Samsung

PM851 mSATA 256GB

Average Bench: 65% (750^th of 1080)

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

Comments

Liked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 65% (750th of 1080)

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

Feedback

Average Bench: 65% (750^th of 1080)