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Samsung

PM851 M.2 2280 512GB

▲ 500 ▼

Release date ≈ Q1 2015.

Average Bench: 65.2% (739th of 1072)

Based on 485 user benchmarks.  Model: SAMSUNG SSD PM851 M.2 2280 512GB
Poor: 41%Average: 65.2% Great: 84%

Popular builds with this SSD

Above average average bench

The Samsung PM851 M.2 2280 512GB averaged 34.8% 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 21.8MB/s
Avg. 4K-64Thread Read Speed 255MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 M.2 2280 512GB is 42.7%. This is a relatively wide range which indicates that the Samsung PM851 M.2 2280 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 195MB/s
Avg. Sustained Write Speed 203MB/s
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Average Bench

(Based on 485 samples)
Rank 73965.2%
Min Avg Max
323 Read 440 506
50.6 Write 225 361
79.6 Mixed 195 370
53.1 SusWrite 203 345
58.9% 266 MB/s
Min Avg Max
11.3 4K Read 21.8 28.7
19 4K Write 49.3 78.5
9.96 4K Mixed 19.9 30.6
84.6% 30.3 MB/s
Min Avg Max
21.6 DQ Read 255 370
43.7 DQ Write 144 221
11.2 DQ Mixed 58.8 89.7
81.5% 153 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
379GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 250 346 352 356 357 355 MB/s
83.8% Excellent
Read 524
Write 43.5
Mixed 158
SusWrite 336
58% 266 MB/s
4K Read 23.9
4K Write 49
4K Mixed 26
96% 33 MB/s
DQ Read 366
DQ Write 217
DQ Mixed 87.5
120% 223 MB/s
440GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 225 342 297 345 334 334 MB/s
80% Very good
Read 476
Write 364
Mixed 178
SusWrite 313
74% 333 MB/s
4K Read 23.5
4K Write 46.1
4K Mixed 26
93% 31.9 MB/s
DQ Read 369
DQ Write 222
DQ Mixed 87.5
121% 226 MB/s
168GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 335 317 341 336 338 339 MB/s
78.3% Very good
Read 475
Write 355
Mixed 175
SusWrite 334
75% 335 MB/s
4K Read 24
4K Write 43.6
4K Mixed 26.4
93% 31.3 MB/s
DQ Read 258
DQ Write 194
DQ Mixed 87.9
103% 180 MB/s
436GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 259 277 241 231 270 242 MB/s
69% Good
Read 441
Write 315
Mixed 160
SusWrite 253
65% 292 MB/s
4K Read 22.7
4K Write 38.2
4K Mixed 21.9
83% 27.6 MB/s
DQ Read 303
DQ Write 173
DQ Mixed 85.2
104% 187 MB/s
406GB free (System drive)
Firmware: EXT23D0Q
SusWrite @10s intervals: 268 298 305 311 332 328 MB/s
61.4% Good
Read 307
Write 310
Mixed 149
SusWrite 307
60% 268 MB/s
4K Read 11
4K Write 34.7
4K Mixed 20.3
61% 22 MB/s
DQ Read 317
DQ Write 182
DQ Mixed 84.8
107% 195 MB/s
249GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 77 69 60 60 57 55 MB/s
50.5% Above average
Read 421
Write 72.7
Mixed 133
SusWrite 62.9
37% 172 MB/s
4K Read 15.1
4K Write 32.2
4K Mixed 22.7
69% 23.3 MB/s
DQ Read 295
DQ Write 66.6
DQ Mixed 68.9
80% 143 MB/s
485 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,657,363 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 M.2 2280 512GB Builds (Compare 454 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 7%
Tree trunk
Desktop
Desktop 44%
Speed boat
Workstation
Workstation 6%
Tree trunk

System: Dell XPS 13 9343

CPU
Core i5-5200UIntelBench 42%, 107,407 samples211x
Core i7-5500UIntelBench 46%, 73,655 samples185x
Core i7-5600UIntelBench 50%, 20,423 samples33x
GPU
HD 5500 (Mobile 0.95 GHz)IntelBench 4%, 231,498 samples454x
SSD
PM851 M.2 2280 512GBSamsungBench 65%, 485 samples46x
RAM
HMT851S6AMR6R-PB 2x4GBHynixBench 48%, 2,847 samples247x
8KTS51264HDZ-1G6E1 2x4GBElpidaBench 45%, 1,032 samples140x
4KTF25664HZ-1G6E1 2x2GBMicronBench 41%, 795 samples41x
EDIT WITH CUSTOM PC BUILDER

Popular PM851 M.2 2280 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.

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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
  • - 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
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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]

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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.

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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 »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $279Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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