Samsung

PM851 2.5 7mm 256GB

PM851 2.5 7mm 256GB
BENCHMARKS (2,656)
MKT (0%)
BUILDS
(1)

Effective Speed -45%Effective Speed -45%Average Score -74%Read -7%, Write -117%, 4K Read -48%, 4K Write -51%, Mixed -130%, 4K Mixed -94%, SusWrite -72%Peak Score -55%Read -2%, Write -86%, 4K Read -27%, 4K Write -25%, Mixed -108%, 4K Mixed -89%, SusWrite -51%Value & Sentiment -851%User Rating -14%, Market Share -1,689%Nice To Haves -87%DQ Read 2%, DQ Write -40%, DQ Mixed -294%, ADQ Read 0%, ADQ Write -63%, ADQ Mixed -260%, Age -24%, AS-SSD Total -16%

Average Bench: 67.7% (703^rd of 1072)

Based on 2,656 user benchmarks. Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Poor: 44%Average: 67.7% Great: 90%

Popular builds with this SSD

Above average average bench

The Samsung PM851 2.5 7mm 256GB averaged 32.2% 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 327MB/s

Avg. 4K Random Read Speed 23.2MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 45.8%. This is a relatively wide range which indicates that the Samsung PM851 2.5 7mm 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 156MB/s

Avg. Sustained Write Speed 172MB/s

Average Bench

(Based on 2,656 samples)

Rank 70367.7%

Min	Avg	Max
319	Read 426	499
41.5	Write 187	261
71.8	Mixed 156	203
38.6	SusWrite 172	256
52% 235 MB/s

Min	Avg	Max
12	4K Read 23.2	33.9
26.8	4K Write 58.1	97.9
14	4K Mixed 23.2	30.9
95.6% 34.8 MB/s

Min	Avg	Max
191	DQ Read 327	374
48	DQ Write 177	256
45.8	DQ Mixed 72.2	84
102% 192 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

PAK-User, 1 month ago.

108GB free (System drive)

Firmware: EXT08D0Q

SusWrite @10s intervals: 176 179 195 197 197 208 MB/s

75.4% Very good

Write 218

Mixed 171

SusWrite 192

57% 256 MB/s

4K Read 27

4K Write 65.2

4K Mixed 27.6

111% 39.9 MB/s

DQ Read 366

DQ Write 185

DQ Mixed 72.6

108% 208 MB/s

ZAF-User, 1 month ago.

112GB free (System drive)

Firmware: EXT08D0Q

SusWrite @10s intervals: 139 172 192 197 193 217 MB/s

74.1% Very good

Write 196

Mixed 167

SusWrite 185

56% 255 MB/s

4K Read 26.1

4K Write 62.4

4K Mixed 26.7

107% 38.4 MB/s

DQ Read 343

DQ Write 173

DQ Mixed 71.5

103% 196 MB/s

PAK-User, 1 month ago.

116GB free (System drive)

Firmware: EXT08D0Q

SusWrite @10s intervals: 200 200 203 208 242 241 MB/s

72.6% Very good

Write 187

Mixed 164

SusWrite 216

55% 248 MB/s

4K Read 23.4

4K Write 61

4K Mixed 24.7

99% 36.4 MB/s

DQ Read 364

DQ Write 185

DQ Mixed 81.8

112% 210 MB/s

USA-User, 4 hrs ago.

118GB free (System drive)

Firmware: EXT07D0Q

SusWrite @10s intervals: 197 154 119 157 100 160 MB/s

66.2% Good

Write 123

Mixed 138

SusWrite 148

45% 204 MB/s

4K Read 23.4

4K Write 57

4K Mixed 25.6

98% 35.3 MB/s

DQ Read 350

DQ Write 136

DQ Mixed 79

102% 188 MB/s

IND-User, 14 days ago.

210GB free (System drive)

Firmware: EXT08D0Q

SusWrite @10s intervals: 113 129 103 89 126 98 MB/s

65.8% Good

Write 105

Mixed 103

SusWrite 110

41% 190 MB/s

4K Read 24.7

4K Write 61.2

4K Mixed 25.4

102% 37.1 MB/s

DQ Read 332

DQ Write 135

DQ Mixed 72.2

96% 180 MB/s

USA-User, 8 hrs ago.

115GB free (System drive)

Firmware: 8D0Q

SusWrite @10s intervals: 133 161 184 164 160 176 MB/s

47.3% Average

Write 93.1

Mixed 84.4

SusWrite 163

36% 161 MB/s

4K Read 21

4K Write 23.6

4K Mixed 16.5

66% 20.4 MB/s

DQ Read 209

DQ Write 27.4

DQ Mixed 41

50% 92.4 MB/s

EGY-User, 1 day ago.

34GB free (System drive)

Firmware: EXT06D0Q

SusWrite @10s intervals: 65 46 49 47 44 42 MB/s

42.9% Average

Write 71.8

Mixed 101

SusWrite 48.9

30% 140 MB/s

4K Read 19.4

4K Write 45.2

4K Mixed 20.6

80% 28.4 MB/s

DQ Read 33.9

DQ Write 52.4

DQ Mixed 30.1

26% 38.8 MB/s

2,656 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,713,297 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 2.5 7mm 256GB Builds (Compare 10,596 builds) See popular component choices, score breakdowns and rankings

Gaming 9%

Tree trunk

Desktop 66%

Battle cruiser

Workstation 9%

Tree trunk

Motherboard: Dell OptiPlex 9020

CPU
Core i7-4790Intel $135Bench 71%, 255,027 samples	3,459x
Core i7-4770Intel $75Bench 70%, 176,321 samples	2,217x
Core i5-4590Intel $188Bench 63%, 151,366 samples	1,850x

GPU
HD 4600 (Desktop 1.25 GHz)Intel $15Bench 3%, 230,189 samples	3,548x
GTX 1650Nvidia $155Bench 43%, 259,091 samples	708x
GTX 1050-TiNvidia $59Bench 29%, 946,701 samples	682x

SSD
PM851 2.5 7mm 256GBSamsungBench 68%, 2,656 samples	1x

RAM
4x8GBUnknownBench 70%, 41,916 samples	253x
8JTF51264AZ-1G6E1 2x4GBMicronBench 52%, 17,707 samples	182x
2x8GBUnknownBench 64%, 236,291 samples	170x

EDIT WITH CUSTOM PC BUILDER

Value: 83% - Excellent

Total price: $150

Popular PM851 2.5 7mm 256GB compatible motherboards:

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) April 2024 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.

1072 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 $273	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177	Nvidia RTX 4070 $539	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

Samsung

PM851 2.5 7mm 256GB

Average Bench: 67.7% (703^rd of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

Motherboard: Dell OptiPlex 9020

Popular PM851 2.5 7mm 256GB compatible motherboards:

UserBenchmark of the month

How it works

Group Test Results

Comments

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Best User Rated

Samsung

PM851 2.5 7mm 256GB

Average Bench: 67.7% (703rd of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

Motherboard: Dell OptiPlex 9020

Popular PM851 2.5 7mm 256GB compatible motherboards:

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: 67.7% (703^rd of 1072)