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Samsung

PM851 M.2 2280 256GB

▲ 500 ▼

Release date ≈ Q1 2015.

Average Bench: 63.1% (767th of 1072)

Based on 2,092 user benchmarks.  Model: SAMSUNG SSD PM851 M.2 2280 256GB
Poor: 42%Average: 63.1% Great: 85%

Popular builds with this SSD

Above average average bench

The Samsung PM851 M.2 2280 256GB averaged 36.8% 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-64Thread Read Speed 314MB/s
Avg. 4K-64Thread Mixed IO Speed 69.9MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 M.2 2280 256GB is 43.3%. This is a relatively wide range which indicates that the Samsung PM851 M.2 2280 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 146MB/s
Avg. Sustained Write Speed 158MB/s
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Average Bench

(Based on 2,092 samples)
Rank 76763.1%
Min Avg Max
317 Read 416 493
44.7 Write 170 260
78.6 Mixed 146 200
42.7 SusWrite 158 254
49% 223 MB/s
Min Avg Max
10.6 4K Read 21.4 30.5
20.7 4K Write 51.5 90.6
11.9 4K Mixed 21.3 29.5
87.1% 31.4 MB/s
Min Avg Max
172 DQ Read 314 372
47.2 DQ Write 156 255
46.7 DQ Mixed 69.9 82
95.8% 180 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
133GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 159 143 151 153 149 134 MB/s
62.9% Good
Read 439
Write 184
Mixed 153
SusWrite 148
51% 231 MB/s
4K Read 20.7
4K Write 41.4
4K Mixed 20.9
80% 27.7 MB/s
DQ Read 346
DQ Write 186
DQ Mixed 80.9
110% 204 MB/s
108GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 109 115 103 100 100 97 MB/s
59.1% Above average
Read 447
Write 174
Mixed 172
SusWrite 104
49% 224 MB/s
4K Read 16.6
4K Write 46.7
4K Mixed 21.1
77% 28.1 MB/s
DQ Read 326
DQ Write 177
DQ Mixed 70.7
101% 191 MB/s
141GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 53 53 47 59 51 61 MB/s
51.2% Above average
Read 355
Write 50.4
Mixed 94
SusWrite 53.9
30% 138 MB/s
4K Read 23.3
4K Write 41
4K Mixed 18.8
81% 27.7 MB/s
DQ Read 354
DQ Write 62.2
DQ Mixed 50.6
78% 156 MB/s
197GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 86 47 48 46 40 45 MB/s
49.8% Average
Read 377
Write 85.6
Mixed 117
SusWrite 52
34% 158 MB/s
4K Read 14.8
4K Write 32.3
4K Mixed 20.9
66% 22.7 MB/s
DQ Read 360
DQ Write 123
DQ Mixed 72.7
98% 185 MB/s
52GB free (System drive)
Firmware: EXT25D0Q
SusWrite @10s intervals: 80 36 31 35 33 33 MB/s
38.2% Below average
Read 324
Write 38.7
Mixed 58.1
SusWrite 41.1
25% 115 MB/s
4K Read 15.5
4K Write 32.4
4K Mixed 16
61% 21.3 MB/s
DQ Read 145
DQ Write 36.2
DQ Mixed 34.9
40% 72.1 MB/s
2,092 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,661,383 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 256GB 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 256GBSamsungBench 63%, 2,092 samples156x
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 256GB 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
  • - Compare your components to the current market leaders
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  • - Compare your in-game FPS to other users with your hardware
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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Speed Comparisons

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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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