Samsung

PM851 mSATA 512GB

PM851 mSATA 512GB
BENCHMARKS (958)
MKT (0%)
BUILDS
(1)

Effective Speed -43%Effective Speed -43%Average Score -66%Read -9%, Write -68%, 4K Read -53%, 4K Write -77%, Mixed -135%, 4K Mixed -88%, SusWrite -31%Peak Score -48%Read -3%, Write -34%, 4K Read -39%, 4K Write -54%, Mixed -114%, 4K Mixed -79%, SusWrite -9%Value & Sentiment User Rating -14%, Market Share -∞%Nice To Haves -86%DQ Read 1%, DQ Write -61%, DQ Mixed -266%, ADQ Read -2%, ADQ Write -82%, ADQ Mixed -234%, Age -27%, AS-SSD Total -21%

Average Bench: 69% (685^th of 1072)

Based on 958 user benchmarks. Model: SAMSUNG SSD PM851 mSATA 512GB

Poor: 44%Average: 69% Great: 90%

Popular builds with this SSD

Above average average bench

The Samsung PM851 mSATA 512GB averaged 30.9% 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 320MB/s

Avg. 4K-64Thread Mixed IO Speed 78MB/s

See where your SSD ranks →

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 512GB is 46.4%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 153MB/s

Avg. Sustained Write Speed 227MB/s

Average Bench

(Based on 958 samples)

Rank 68569%

Min	Avg	Max
314	Read 420	491
54.1	Write 241	362
89.6	Mixed 153	198
48.6	SusWrite 227	354
57.7% 260 MB/s

Min	Avg	Max
11.3	4K Read 22.4	30.9
22.6	4K Write 49.6	79.4
13.9	4K Mixed 23.9	32.5
90.9% 32 MB/s

Min	Avg	Max
135	DQ Read 320	372
50.4	DQ Write 159	222
48.9	DQ Mixed 78	90.5
101% 186 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

PAK-User, 10 days ago.

430GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 312 328 322 302 300 265 MB/s

68.8% Good

Write 355

Mixed 177

SusWrite 305

71% 319 MB/s

4K Read 17.2

4K Write 35.4

4K Mixed 19.9

70% 24.2 MB/s

DQ Read 275

DQ Write 218

DQ Mixed 87.3

109% 193 MB/s

ITA-User, 3 months ago.

320GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 264 300 313 329 326 343 MB/s

56.7% Above average

Write 47.8

Mixed 170

SusWrite 312

52% 233 MB/s

4K Read 12.6

4K Write 17.6

4K Mixed 13.6

46% 14.6 MB/s

DQ Read 169

DQ Write 160

DQ Mixed 72.4

80% 134 MB/s

AUT-User, 4 months ago.

360GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 271 248 306 318 318 265 MB/s

48.8% Average

Write 217

Mixed 154

SusWrite 288

56% 251 MB/s

4K Read 11.3

4K Write 28.3

4K Mixed 14.3

50% 18 MB/s

DQ Read 26.6

DQ Write 58.6

DQ Mixed 29.7

26% 38.3 MB/s

AUT-User, 4 months ago.

372GB free (System drive)

Firmware: EXT4AD0Q

SusWrite @10s intervals: 222 227 195 274 328 298 MB/s

48% Average

Write 213

Mixed 110

SusWrite 257

53% 238 MB/s

4K Read 11

4K Write 27.3

4K Mixed 14.4

50% 17.6 MB/s

DQ Read 27.4

DQ Write 60.4

DQ Mixed 26.8

25% 38.2 MB/s

USA-User, 4 months ago.

257GB free (System drive)

Firmware: EXT48D0Q

SusWrite @10s intervals: 168 190 182 179 180 174 MB/s

36.9% Below average

Write 207

Mixed 144

SusWrite 179

46% 206 MB/s

4K Read 11.3

4K Write 11.6

4K Mixed 10

36% 11 MB/s

DQ Read 82.3

DQ Write 59.2

DQ Mixed 53.6

45% 65 MB/s

958 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,713,771 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 512GB Builds (Compare 1,328 builds) See popular component choices, score breakdowns and rankings

Gaming 29%

Raft

Desktop 101%

UFO

Workstation 30%

Raft

System: Dell XPS 15 9530

CPU
Core i7-13700HIntelBench 104%, 4,359 samples	499x
Core i9-13900HIntelBench 107%, 5,250 samples	449x
Core i7-4712HQIntelBench 61%, 5,396 samples	260x

GPU
Iris Xe GraphicsIntelBench 19%, 14,602 samples	588x
HD 4600 (Mobile 1.15 GHz)IntelBench 3%, 258,091 samples	260x
RTX 4070 (Laptop)NvidiaBench 132%, 10,174 samples	136x

SSD
PM851 mSATA 512GBSamsungBench 69%, 958 samples	1x

RAM
HMCG78AEBSA095N 2x16GBUnknownBench 141%, 1,479 samples	213x
M425R1GB4BB0-CQKOL 2x8GBUnknownBench 122%, 4,457 samples	129x
HMCG78MEBSA095N 2x16GBUnknownBench 129%, 3,160 samples	109x

EDIT WITH CUSTOM PC BUILDER

Popular PM851 mSATA 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

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 mSATA 512GB

Average Bench: 69% (685^th of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell XPS 15 9530

Popular PM851 mSATA 512GB systems:

UserBenchmark of the month

How it works

Group Test Results

Comments

Disliked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

Samsung

PM851 mSATA 512GB

Average Bench: 69% (685th of 1072)

Popular builds with this SSD

Above average average bench

Strengths

Average consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell XPS 15 9530

Popular PM851 mSATA 512GB systems:

UserBenchmark of the month

How it works

Group Test Results

Share a related link

Comments

Disliked (edit your comment) Add link

Speed Comparisons

Frequently Asked Questions

Best User Rated

Feedback

Average Bench: 69% (685^th of 1072)