Samsung

PM851 2.5 7mm 512GB

PM851 2.5 7mm 512GB
BENCHMARKS (527)
MKT (0%)
BUILDS
(0)

Effective Speed -38%Effective Speed -38%Average Score -54%Read -3%, Write -63%, 4K Read -48%, 4K Write -60%, Mixed -93%, 4K Mixed -88%, SusWrite -24%Peak Score -24%Read 1%, Write -16%, 4K Read -30%, 4K Write -44%, Mixed -12%, 4K Mixed -74%, SusWrite 8%Value & Sentiment User Rating -14%, Market Share -∞%Nice To Haves -91%DQ Read 2%, DQ Write -61%, DQ Mixed -260%, ADQ Read -7%, ADQ Write -88%, ADQ Mixed -277%, Age -20%, AS-SSD Total -18%

Average Bench: 71.3% (648^th of 1072)

Based on 527 user benchmarks. Model: SAMSUNG SSD PM851 2.5 7mm 512GB

Poor: 45%Average: 71.3% Great: 96%

Popular builds with this SSD

Good average bench

The Samsung PM851 2.5 7mm 512GB averaged 28.6% 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 305MB/s

Avg. 4K Random Read Speed 23.2MB/s

See where your SSD ranks →

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 512GB is 51%. This is a relatively wide range which indicates that the Samsung PM851 2.5 7mm 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 186MB/s

Avg. Sustained Write Speed 240MB/s

Average Bench

(Based on 527 samples)

Rank 64871.3%

Min	Avg	Max
333	Read 443	511
50.2	Write 249	418
83	Mixed 186	378
47.8	SusWrite 240	417
62.1% 279 MB/s

Min	Avg	Max
12.7	4K Read 23.2	33
27.9	4K Write 54.7	85
12.2	4K Mixed 24	33.5
94.9% 34 MB/s

Min	Avg	Max
28.6	DQ Read 305	374
48.9	DQ Write 154	222
17.2	DQ Mixed 69.1	91.9
94.1% 176 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 3 months ago.

221GB free

Firmware: EXT06D0Q

SusWrite @10s intervals: 323 332 419 421 423 421 MB/s

93.6% Outstanding

Write 407

Mixed 202

SusWrite 390

83% 372 MB/s

4K Read 28.6

4K Write 74.5

4K Mixed 30.9

122% 44.7 MB/s

DQ Read 366

DQ Write 221

DQ Mixed 89.7

122% 226 MB/s

SGP-User, 4 months ago.

286GB free

Firmware: EXT07D0Q

SusWrite @10s intervals: 404 418 419 420 421 421 MB/s

93.4% Outstanding

Write 413

Mixed 194

SusWrite 417

85% 378 MB/s

4K Read 30.9

4K Write 54.6

4K Mixed 30.5

115% 38.7 MB/s

DQ Read 373

DQ Write 221

DQ Mixed 56.3

106% 217 MB/s

ROU-User, 24 days ago.

51GB free

Firmware: EXT07D0Q

SusWrite @10s intervals: 408 394 254 170 142 103 MB/s

77.9% Very good

Write 410

Mixed 219

SusWrite 245

76% 340 MB/s

4K Read 27.4

4K Write 58.5

4K Mixed 29.8

111% 38.6 MB/s

DQ Read 232

DQ Write 196

DQ Mixed 81.4

97% 170 MB/s

CAN-User, 2 months ago.

410GB free (System drive)

Firmware: EXT06D0Q

SusWrite @10s intervals: 253 190 182 159 165 151 MB/s

73.4% Very good

Write 418

Mixed 188

SusWrite 183

70% 315 MB/s

4K Read 25.6

4K Write 49.3

4K Mixed 27.7

100% 34.2 MB/s

DQ Read 364

DQ Write 201

DQ Mixed 90.1

119% 219 MB/s

CAN-User, 2 months ago.

47GB free (System drive)

Firmware: EXT06D0Q

SusWrite @10s intervals: 107 79 77 62 45 40 MB/s

68.5% Good

Write 234

Mixed 174

SusWrite 68.2

52% 239 MB/s

4K Read 29.1

4K Write 55.1

4K Mixed 29

110% 37.7 MB/s

DQ Read 371

DQ Write 140

DQ Mixed 85.4

108% 199 MB/s

USA-User, 3 months ago.

118GB free (System drive)

Firmware: EXT07D0Q

SusWrite @10s intervals: 116 77 85 83 82 77 MB/s

59.8% Above average

Write 154

Mixed 130

SusWrite 86.9

44% 201 MB/s

4K Read 21

4K Write 46.4

4K Mixed 24.9

88% 30.8 MB/s

DQ Read 357

DQ Write 88.3

DQ Mixed 91.4

101% 179 MB/s

527 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,716,440 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 512GB Builds (Compare 1,503 builds) See popular component choices, score breakdowns and rankings

Gaming 82%

Aircraft carrier

Desktop 81%

Aircraft carrier

Workstation 72%

Battleship

System: Alienware Area-51 R2

CPU
Core i7-5820KIntel $130Bench 77%, 101,694 samples	807x
Core i7-6800KIntel $103Bench 81%, 50,196 samples	249x
Core i7-5930KIntel $70Bench 80%, 34,039 samples	198x

GPU
GTX 1080Nvidia $400Bench 102%, 1,082,454 samples	224x
GTX 980Nvidia $500Bench 59%, 167,107 samples	173x
GTX 1070Nvidia $132Bench 80%, 1,459,281 samples	112x

SSD
PM851 2.5 7mm 512GBSamsungBench 71%, 527 samples	1x

RAM
HMA41GU6AFR8N-TF 4x8GBHynixBench 83%, 2,656 samples	134x
HMA451U6AFR8N-TF 4x4GBHynixBench 84%, 1,850 samples	130x
M378A5143DB0-CPB 4x4GBSamsungBench 88%, 1,582 samples	130x

EDIT WITH CUSTOM PC BUILDER

Value: 69% - Good

Total price: $530

Popular PM851 2.5 7mm 512GB 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

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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
- 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 512GB

Average Bench: 71.3% (648^th of 1072)

Popular builds with this SSD

Good average bench

Strengths

Below average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Alienware Area-51 R2

Popular PM851 2.5 7mm 512GB systems:

UserBenchmark of the month

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Group Test Results

Comments

Speed Comparisons

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Best User Rated

Samsung

PM851 2.5 7mm 512GB

Average Bench: 71.3% (648th of 1072)

Popular builds with this SSD

Good average bench

Strengths

Below average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Alienware Area-51 R2

Popular PM851 2.5 7mm 512GB systems:

UserBenchmark of the month

How it works

Group Test Results

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Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

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Average Bench: 71.3% (648^th of 1072)