Average Bench: 70% (574th of 1003)

Based on 249 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 512GB

Above average average bench

The Samsung PM851 2.5 7mm 512GB averaged 30.0% 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 23.3MB/s
Avg. 4K-64Thread Read Speed 257MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 512GB is 48.4%. 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. Sustained Write Speed 234MB/s
Avg. Sequential Mixed IO Speed 236MB/s
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Average Bench

(Based on 249 samples)
Min Avg Max
336 Read 463 517
45.2 Write 261 418
79.5 Mixed 236 416
47.9 SusWrite 234 412
66.3% 298 MB/s
Min Avg Max
14.7 4K Read 23.3 32.2
26.7 4K Write 54.5 88.1
11.5 4K Mixed 20.1 32.5
89.8% 32.6 MB/s
Min Avg Max
22.6 DQ Read 257 373
46.3 DQ Write 153 223
12.8 DQ Mixed 50.3 91
78.9% 153 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
477GB free
Firmware: EXT07D0Q
SusWrite @10s intervals: 415 409 416 419 418 420 MB/s
Read 488
Write 409
Mixed 194
SusWrite 416
84% 377 MB/s
4K Read 28.3
4K Write 79.8
4K Mixed 31.7
126% 46.6 MB/s
DQ Read 374
DQ Write 219
DQ Mixed 93.4
124% 229 MB/s
427GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 336 391 373 387 394 398 MB/s
Read 468
Write 416
Mixed 190
SusWrite 380
81% 363 MB/s
4K Read 21.8
4K Write 60
4K Mixed 28
101% 36.6 MB/s
DQ Read 371
DQ Write 218
DQ Mixed 90.7
122% 227 MB/s
266GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 115 128 168 130 160 267 MB/s
Read 431
Write 92.1
Mixed 122
SusWrite 161
44% 202 MB/s
4K Read 19
4K Write 40.9
4K Mixed 22.9
80% 27.6 MB/s
DQ Read 367
DQ Write 101
DQ Mixed 76.7
98% 182 MB/s
218GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 106 99 89 134 170 235 MB/s
Read 404
Write 56.3
Mixed 100
SusWrite 139
38% 175 MB/s
4K Read 21.1
4K Write 49.2
4K Mixed 25.5
91% 31.9 MB/s
DQ Read 314
DQ Write 102
DQ Mixed 72.6
89% 163 MB/s
218GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 91 65 87 75 70 71 MB/s
Read 391
Write 80.3
Mixed 121
SusWrite 76.2
36% 167 MB/s
4K Read 24.5
4K Write 55.4
4K Mixed 28
102% 36 MB/s
DQ Read 368
DQ Write 78.9
DQ Mixed 80.5
96% 176 MB/s
249 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 15,197,672 SSDs tested.

Typical PM851 2.5 7mm 512GB Builds (Compare 2,574 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 101%
UFO
Desktop
Desktop 72%
Battleship
Workstation
Workstation 70%
Battle cruiser

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 87% - Excellent Total price: $919

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.

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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) June 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

1003 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 i7-8700K $350Nvidia GTX 1070 $335Samsung 850 Evo 250GB $101
AMD Ryzen 5 2600 $144Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $100
AMD Ryzen 7 2700X $280Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $78SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $646SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $75SanDisk Ultra Fit 32GB $12
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