Samsung

PM851 mSATA 256GB

PM851 mSATA 256GB
BENCHMARKS (4,423)
MKT (0%)
BUILDS
(1)

Effective Speed -48%Effective Speed -48%Average Score -74%Read -10%, Write -105%, 4K Read -46%, 4K Write -65%, Mixed -125%, 4K Mixed -102%, SusWrite -65%Peak Score -59%Read -3%, Write -85%, 4K Read -22%, 4K Write -43%, Mixed -111%, 4K Mixed -91%, SusWrite -55%Value & Sentiment -745%User Rating -42%, Market Share -1,448%Nice To Haves -86%DQ Read 2%, DQ Write -39%, DQ Mixed -278%, ADQ Read -3%, ADQ Write -64%, ADQ Mixed -257%, Age -29%, AS-SSD Total -17%

Average Bench: 66.2% (680^th of 1037)

Based on 4,423 user benchmarks. Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Poor: 46%Average: 66.2% Great: 86%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 256GB averaged 33.7% 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 315MB/s

Avg. 4K Random Read Speed 22.8MB/s

See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 40%. 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 159MB/s

Avg. Sustained Write Speed 181MB/s

Average Bench

(Based on 4,423 samples)

Rank 68066.2%

Min	Avg	Max
325	Read 416	487
48.7	Write 200	262
85.4	Mixed 159	196
45.2	SusWrite 181	253
52.8% 239 MB/s

Min	Avg	Max
11.6	4K Read 22.8	33.5
25	4K Write 53.9	84.2
13.2	4K Mixed 22	29.4
91.2% 32.9 MB/s

Min	Avg	Max
136	DQ Read 315	372
52	DQ Write 179	257
42.8	DQ Mixed 71.7	83.8
100% 189 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 1 day ago.

191GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 202 221 250 249 251 252 MB/s

80.6% Excellent

Write 253

Mixed 173

SusWrite 237

61% 274 MB/s

4K Read 30.4

4K Write 69.8

4K Mixed 26.7

117% 42.3 MB/s

DQ Read 368

DQ Write 247

DQ Mixed 82.9

122% 232 MB/s

USA-User, 1 day ago.

211GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 242 235 239 239 239 237 MB/s

77.6% Very good

Write 252

Mixed 185

SusWrite 238

64% 287 MB/s

4K Read 31.5

4K Write 68.5

4K Mixed 27.4

119% 42.5 MB/s

DQ Read 252

DQ Write 124

DQ Mixed 48.3

73% 141 MB/s

VNM-User, 1 day ago.

50GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 171 112 89 86 86 77 MB/s

65.4% Good

Write 222

Mixed 153

SusWrite 104

50% 230 MB/s

4K Read 24.5

4K Write 58.6

4K Mixed 23.4

98% 35.5 MB/s

DQ Read 364

DQ Write 168

DQ Mixed 76

107% 203 MB/s

USA-User, 15 hrs ago.

205GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 191 114 106 113 156 125 MB/s

63.2% Good

Write 220

Mixed 177

SusWrite 134

52% 235 MB/s

4K Read 23

4K Write 66.7

4K Mixed 25.2

102% 38.3 MB/s

DQ Read 128

DQ Write 208

DQ Mixed 72.4

82% 136 MB/s

AUS-User, 1 day ago.

7GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 73 42 45 43 41 41 MB/s

57.3% Above average

Write 91.3

Mixed 108

SusWrite 47.2

36% 166 MB/s

4K Read 24.4

4K Write 57.9

4K Mixed 20.5

94% 34.3 MB/s

DQ Read 368

DQ Write 69

DQ Mixed 68.5

89% 169 MB/s

PRT-User, 19 hrs ago.

192GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 128 99 112 91 98 94 MB/s

49.8% Average

Write 256

Mixed 177

SusWrite 104

51% 228 MB/s

4K Read 13.9

4K Write 23

4K Mixed 15.5

53% 17.5 MB/s

DQ Read 357

DQ Write 183

DQ Mixed 72.5

107% 204 MB/s

4,423 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,610,979 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 1,459 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 55%, 17,837 samples	573x
Core i5-4310UIntelBench 55%, 9,842 samples	505x
Core i5-4300UIntelBench 53%, 27,613 samples	317x

GPU
HD 4400 (Mobile 1.0/1.1 GHz)IntelBench 2%, 230,251 samples	1,453x
HD Graphics Family(PHDGD Skylake v2.0)IntelBench 2%, 15 samples	1x
HD 7950AMD $290Bench 30%, 30,548 samples	1x

SSD
PM851 mSATA 256GBSamsungBench 66%, 4,423 samples	227x

RAM
M471B1G73DB0-YK0 1x8GBSamsungBench 28%, 33,004 samples	77x
HMT451S6BFR8A-PB 2x4GBHynixBench 47%, 31,649 samples	74x
M471B5173DB0-YK0 2x4GBSamsungBench 47%, 21,777 samples	58x

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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ProGaming

CPU

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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.
- 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) September 2020 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.

1037 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 i5-9600K $195	Nvidia GTX 1660S (Super) $230	Crucial MX500 250GB $45
Intel Core i5-9400F $140	Nvidia GTX 1650S (Super) $170	Samsung 850 Evo 120GB $78
Intel Core i7-9700K $289	Nvidia RTX 2070S (Super) $505	Samsung 860 Evo 250GB $43

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $35	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65	SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85	G.SKILL Trident Z DDR4 3200 C14 4x16GB $649	SanDisk Extreme 16GB $28

Samsung

PM851 mSATA 256GB

Average Bench: 66.2% (680^th of 1037)

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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Speed Comparisons

Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 256GB

Average Bench: 66.2% (680th of 1037)

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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Comments

Liked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

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Average Bench: 66.2% (680^th of 1037)