Average Bench: 70% (538th of 980)

Based on 210 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 512GB

Good average bench

The Samsung PM851 2.5 7mm 512GB averaged 29.9% 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 Random Read Speed 23.2MB/s
Avg. Sequential Read Speed 469MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 512GB is 47.9%. 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 251MB/s
Avg. Sustained Write Speed 256MB/s
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Average Bench

(Based on 210 samples)
Min Avg Max
339 Read 469 517
44.3 Write 268 418
76.6 Mixed 251 418
49.1 SusWrite 256 412
69.2% 311 MB/s
Min Avg Max
15 4K Read 23.2 31.4
26.5 4K Write 54.5 89.7
11.4 4K Mixed 19 32
88.3% 32.2 MB/s
Min Avg Max
22.2 DQ Read 244 373
45.7 DQ Write 154 224
12.4 DQ Mixed 45.1 90
75% 148 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
376GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 302 312 349 356 358 351 MB/s
Read 455
Write 405
Mixed 190
SusWrite 338
78% 347 MB/s
4K Read 28.2
4K Write 81.4
4K Mixed 32.1
127% 47.2 MB/s
DQ Read 373
DQ Write 218
DQ Mixed 89.5
122% 227 MB/s
379GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 294 228 339 340 342 350 MB/s
Read 454
Write 414
Mixed 191
SusWrite 316
77% 343 MB/s
4K Read 28.7
4K Write 82.4
4K Mixed 31.9
128% 47.7 MB/s
DQ Read 366
DQ Write 218
DQ Mixed 92.7
123% 226 MB/s
383GB free (System drive)
Firmware: 8D0Q
SusWrite @10s intervals: 341 346 362 362 359 355 MB/s
Read 396
Write 385
Mixed 170
SusWrite 354
73% 326 MB/s
4K Read 25.2
4K Write 74.8
4K Mixed 31.3
118% 43.8 MB/s
DQ Read 372
DQ Write 208
DQ Mixed 87.8
119% 222 MB/s
379GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 257 257 226 219 222 226 MB/s
Read 490
Write 239
Mixed 182
SusWrite 235
63% 286 MB/s
4K Read 28.4
4K Write 77
4K Mixed 33.3
126% 46.2 MB/s
DQ Read 364
DQ Write 182
DQ Mixed 87.9
115% 211 MB/s
386GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 361 366 302 272 384 378 MB/s
Read 478
Write 327
Mixed 188
SusWrite 344
75% 334 MB/s
4K Read 23.3
4K Write 48.6
4K Mixed 26.2
95% 32.7 MB/s
DQ Read 368
DQ Write 219
DQ Mixed 90.1
122% 226 MB/s
366GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 178 128 125 120 106 108 MB/s
Read 480
Write 235
Mixed 180
SusWrite 127
56% 256 MB/s
4K Read 35.3
4K Write 72.5
4K Mixed 32.6
134% 46.8 MB/s
DQ Read 361
DQ Write 173
DQ Mixed 82.2
110% 205 MB/s
210 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 11,464,199 SSDs tested.

Typical PM851 2.5 7mm 512GB Builds (Compare 2,052 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 103%
UFO
Desktop
Desktop 73%
Battleship
Workstation
Workstation 71%
Battleship

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 90% - Outstanding Total price: $889

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) January 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

980 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 $360Nvidia GTX 1070 $320Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $110
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $115SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $780SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $125SanDisk Extreme 16GB $22
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