Average Bench: 70.4% (583rd of 1011)

Based on 259 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 512GB

Good average bench

The Samsung PM851 2.5 7mm 512GB averaged 29.6% 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 Random Read Speed 23.4MB/s
Avg. 4K-64Thread Read Speed 260MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 512GB is 50.1%. 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 234MB/s
Avg. Sustained Write Speed 238MB/s
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Average Bench

(Based on 259 samples)
Min Avg Max
336 Read 462 516
46 Write 262 418
80.3 Mixed 234 415
49.1 SusWrite 238 413
66.4% 299 MB/s
Min Avg Max
14.9 4K Read 23.4 32.5
26.8 4K Write 54.7 87.7
11.6 4K Mixed 20.4 32.6
90.6% 32.8 MB/s
Min Avg Max
22.9 DQ Read 260 373
46.3 DQ Write 153 223
13 DQ Mixed 51.4 91.2
79.9% 155 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
418GB free (System drive)
Firmware: EXT06D0Q
SusWrite @10s intervals: 398 400 399 401 396 399 MB/s
Read 482
Write 415
Mixed 194
SusWrite 399
83% 372 MB/s
4K Read 31.7
4K Write 71.1
4K Mixed 34.6
130% 45.8 MB/s
DQ Read 362
DQ Write 221
DQ Mixed 91.9
122% 225 MB/s
394GB free (System drive)
Firmware: EXT06D0Q
SusWrite @10s intervals: 396 393 410 406 406 366 MB/s
Read 426
Write 361
Mixed 187
SusWrite 396
77% 343 MB/s
4K Read 31.2
4K Write 73.1
4K Mixed 32.8
128% 45.7 MB/s
DQ Read 366
DQ Write 213
DQ Mixed 87.7
119% 222 MB/s
424GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 163 281 153 281 287 312 MB/s
Read 478
Write 166
Mixed 149
SusWrite 246
57% 260 MB/s
4K Read 22.2
4K Write 49.9
4K Mixed 27.7
96% 33.3 MB/s
DQ Read 371
DQ Write 146
DQ Mixed 83.1
108% 200 MB/s
175GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 224 274 94 84 68 186 MB/s
Read 417
Write 120
Mixed 161
SusWrite 155
47% 213 MB/s
4K Read 24.3
4K Write 60.7
4K Mixed 25.8
102% 36.9 MB/s
DQ Read 330
DQ Write 91.8
DQ Mixed 71.2
89% 164 MB/s
124GB free (System drive)
Firmware: EXT06D0Q
SusWrite @10s intervals: 64 55 51 47 39 44 MB/s
Read 456
Write 57.3
Mixed 103
SusWrite 50
36% 167 MB/s
4K Read 26.1
4K Write 44.5
4K Mixed 25.1
95% 31.9 MB/s
DQ Read 314
DQ Write 64.9
DQ Mixed 66.8
81% 149 MB/s
259 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 16,944,087 SSDs tested.

Typical PM851 2.5 7mm 512GB Builds (Compare 2,778 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 66%
Battle cruiser
Workstation
Workstation 59%
Gunboat

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 56% - Above average Total price: $891

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 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

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) August 2019 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]

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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.

 Comments

1011 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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i5-9400F $143Nvidia GTX 1660 $220Samsung 850 Evo 250GB $86
Intel Core i5-9600K $219Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $102
AMD Ryzen 5 3600 $196AMD RX 580 $173Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $42G.SKILL Trident Z DDR4 3200 C14 4x16GB $799SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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