Average Bench: 70.2% (550th of 992)

Based on 231 user benchmarks.  Model: SAMSUNG SSD PM851 2.5 7mm 512GB

Good average bench

The Samsung PM851 2.5 7mm 512GB averaged 29.7% 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. Sequential Read Speed 465MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 512GB is 47.7%. 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 243MB/s
Avg. Sustained Write Speed 245MB/s
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Average Bench

(Based on 231 samples)
Min Avg Max
336 Read 465 517
45.4 Write 266 418
79.7 Mixed 243 417
48.2 SusWrite 245 412
67.8% 305 MB/s
Min Avg Max
15.1 4K Read 23.4 32
26.7 4K Write 54.6 88.7
11.5 4K Mixed 19.6 32.3
89.5% 32.5 MB/s
Min Avg Max
22.6 DQ Read 252 373
46.1 DQ Write 154 224
12.5 DQ Mixed 48.3 90.3
77.5% 151 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
302GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 284 328 358 352 341 400 MB/s
Read 436
Write 276
Mixed 179
SusWrite 344
69% 309 MB/s
4K Read 18.5
4K Write 38.5
4K Mixed 22.1
77% 26.4 MB/s
DQ Read 378
DQ Write 211
DQ Mixed 82.4
118% 224 MB/s
57GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 177 118 115 75 68 55 MB/s
Read 456
Write 245
Mixed 138
SusWrite 101
52% 235 MB/s
4K Read 25.5
4K Write 57.9
4K Mixed 30.7
109% 38 MB/s
DQ Read 364
DQ Write 130
DQ Mixed 81.5
104% 192 MB/s
167GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 115 145 152 130 121 104 MB/s
Read 478
Write 182
Mixed 132
SusWrite 128
50% 230 MB/s
4K Read 28.1
4K Write 65.2
4K Mixed 30
116% 41.1 MB/s
DQ Read 28.9
DQ Write 111
DQ Mixed 52
45% 64 MB/s
446GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 197 172 180 163 169 162 MB/s
Read 436
Write 221
Mixed 170
SusWrite 174
55% 250 MB/s
4K Read 19.7
4K Write 32.2
4K Mixed 16.2
68% 22.7 MB/s
DQ Read 226
DQ Write 142
DQ Mixed 77
86% 148 MB/s
42GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 57 39 35 31 33 32 MB/s
Read 388
Write 76.5
Mixed 114
SusWrite 37.6
33% 154 MB/s
4K Read 26.5
4K Write 54.4
4K Mixed 18.8
93% 33.2 MB/s
DQ Read 318
DQ Write 53.3
DQ Mixed 60.4
76% 144 MB/s
150GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 181 84 71 59 61 51 MB/s
Read 329
Write 91.2
Mixed 96.7
SusWrite 84.3
33% 150 MB/s
4K Read 18.9
4K Write 42.7
4K Mixed 21.3
78% 27.6 MB/s
DQ Read 325
DQ Write 57
DQ Mixed 86.9
90% 156 MB/s
76GB free (System drive)
Firmware: EXT06D0Q
SusWrite @10s intervals: 68 51 45 48 48 43 MB/s
Read 318
Write 89.2
Mixed 90.5
SusWrite 50.4
30% 137 MB/s
4K Read 17.9
4K Write 51.3
4K Mixed 24.6
86% 31.3 MB/s
DQ Read 289
DQ Write 59.2
DQ Mixed 76.8
81% 142 MB/s
231 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 12,966,448 SSDs tested.

Typical PM851 2.5 7mm 512GB Builds (Compare 2,271 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 102%
UFO
Desktop
Desktop 73%
Battleship
Workstation
Workstation 71%
Battleship

System: Alienware Area-51 R2

EDIT WITH CUSTOM PC BUILDER Value: 88% - 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) March 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

992 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 $370Nvidia GTX 1070 $364Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $761SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110SanDisk Ultra Fit 32GB $12
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