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Samsung MZ-7PD256BW

840 Pro 256GB

▲ 5420,552 ▼

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC. Release date: Q4 2012.

Average Bench: 94.1% (273rd of 1058)

Based on 63,178 user benchmarks.  Models: Samsung SSD 840 PRO Series, Samsung SSD 840, Samsung SSD 840 PRO Seri, Samsung SSD 840 PRO

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]

Poor: 62%Average: 94.1% Great: 116%

Popular builds with this SSD

Excellent average bench

The Samsung 840 Pro 256GB averaged just 5.9% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung 840 Pro 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 143MB/s
Avg. 4K Random Mixed IO Speed 38.8MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 53.9%. This is a relatively wide range which indicates that the Samsung 840 Pro 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 303MB/s
Avg. Sustained Write Speed 321MB/s
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Average Bench

(Based on 63,178 samples)
Rank 27394.1%
Min Avg Max
342 Read 461 509
147 Write 380 482
214 Mixed 303 361
91.8 SusWrite 321 478
82.1% 366 MB/s
Min Avg Max
21.6 4K Read 30.7 36.2
41.2 4K Write 81.2 114
26.7 4K Mixed 38.8 47.4
139% 50.2 MB/s
Min Avg Max
173 DQ Read 332 384
108 DQ Write 254 335
92.6 DQ Mixed 143 175
148% 243 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
117GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 469 468 469 468 470 471 MB/s
109% Outstanding
Read 504
Write 422
Mixed 363
SusWrite 469
99% 439 MB/s
4K Read 32.2
4K Write 77.6
4K Mixed 41.5
143% 50.4 MB/s
DQ Read 372
DQ Write 331
DQ Mixed 170
177% 291 MB/s
237GB free
Firmware: DXM05B0Q
SusWrite @10s intervals: 460 464 411 411 441 436 MB/s
95.5% Outstanding
Read 506
Write 472
Mixed 359
SusWrite 437
100% 444 MB/s
4K Read 32.5
4K Write 51
4K Mixed 34.7
121% 39.4 MB/s
DQ Read 380
DQ Write 123
DQ Mixed 161
143% 222 MB/s
123GB free
Firmware: 6B0Q
SusWrite @10s intervals: 333 426 445 436 450 446 MB/s
92.7% Outstanding
Read 455
Write 450
Mixed 341
SusWrite 423
94% 417 MB/s
4K Read 31
4K Write 85.4
4K Mixed 41.6
146% 52.7 MB/s
DQ Read 36
DQ Write 121
DQ Mixed 49.7
46% 68.9 MB/s
209GB free (System drive)
Firmware: DXM05B0Q
SusWrite @10s intervals: 317 354 362 355 346 346 MB/s
76.7% Very good
Read 416
Write 342
Mixed 274
SusWrite 347
77% 345 MB/s
4K Read 25.5
4K Write 46.1
4K Mixed 30.7
102% 34.1 MB/s
DQ Read 163
DQ Write 149
DQ Mixed 110
95% 141 MB/s
63,178 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,300,380 SSDs tested.

 Prices

MSRP ≈ $203 @ launch in Oct '12
EbayUS $2091 min
AmazonUS $27116 months
Send price feedback
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 840 Pro 256GB Builds (Compare 4,326 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 65%
Battle cruiser
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 55%
Yacht

Motherboard: Asus MAXIMUS VI HERO - $190

CPU
Core i7-4770KIntel  $300Bench 78%, 168,671 samples2,041x
Core i5-4670KIntel  $205Bench 78%, 127,584 samples769x
Core i7-4790KIntel  $348Bench 83%, 389,955 samples551x
GPU
GTX 1070Nvidia  $400Bench 80%, 1,151,383 samples331x
GTX 970Nvidia  $340Bench 51%, 731,766 samples287x
GTX 1080Nvidia  $540Bench 105%, 878,504 samples261x
SSD
840 Pro 256GBSamsung  $209Bench 94%, 63,178 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 64%, 23,572 samples163x
Savage DDR3 2400 C11 2x8GBHyperXBench 63%, 21,391 samples111x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 54%, 40,281 samples111x
EDIT WITH CUSTOM PC BUILDER Value: 48% - Average Total price: $1,099

Popular 840 Pro 256GB compatible motherboards:

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.

UserBenchmark of the month

Gaming Desktop ProGaming

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.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Solid State Drive Rankings (Price vs Performance) September 2021 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

SSDrivePro
Avatar level
1,857

Official site www.samsung.com/...

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC

Delivers high speeds for both compressible and incompressible data...

Added 8 years ago.
USA-User
Avatar level
8,120

Good (edit your comment) Add link

18 months ago.

Got it a year or so ago and I loved it then and still love it now, though it is a little pricy

Comment 

T61P with win7 64 &, Intel Extreme X9000, 8gb ram, fast ......... verrrry fast. Faster than many new computers. Gives a lot of new life to older PCs.—Sep '14

DEU-User
Avatar level
4,931

Excellent

2 years ago.

Owning it for almost 6 Years, still running very fast

CAN-User
Avatar level
4,188

Good

3 years ago.

An awesome drive! Going to get one to upgrade my rig!

IND-User
Avatar level
3,870

Average

3 years ago.

Need to improve a lot on Research and Development . Please don't fool people with your small small improvements .With R&D U can do much better.

POL-User
Avatar level
3,864

Good

4 years ago.

Excellent performance and reliability. I already have 5TB traffic over the past year. Performance has not decreased!

ESP-User
Avatar level
3,281

Liked

4 years ago.

ZAF-User
Avatar level
2,324

Poor

5 years ago.

Can someone please explain to me why I get under 1MB/s 4K Mixed IO with my Samsung 840 pro when the average UBM Speed is 21.8MB/s for 4K Mixed IO operations?

AUT-User
Avatar level
2,317

Excellent

16 months ago.

Comment 

though for any practical purpose the EVO is just as good/fast—Sep '14

SSDrivePro
Avatar level
1,857

Very good

8 years ago.

Review  hexus.net/...

Image  img.hexus.net/...
Sep '12 AS SSD Benchmark Test

Sep '12 AS SSD Benchmark Test

Review  www.hardocp.com/...

Review  www.servethehome.com/...

Image  www.servethehome.com/...
Nov '12 AS SSD Benchmark Test Score

Nov '12 AS SSD Benchmark Test Score

Review  www.custompcreview.com/...

Image  www.custompcreview.com/...
Sep '12 AS SSD Benchmark Speed Test Score

Sep '12 AS SSD Benchmark Speed Test Score

Deal  www.google.co.uk/...

Jun '13 £185 @Ebuyer

NZL-User
Avatar level
1,756

Liked

5 years ago.

Comment 

Great drive under normal/light load. Write latency starts to fall apart a bit under sustained loads.—Sep '14

Rand
Avatar level
427

Very good

8 years ago.

This drive, the latest from Samsung, takes SSD technology a small but clear step forward. It excels in the area of deep queue depth 4k random writes where it outperforms all of its direct competition. The brand new and almost impossible to get hold of Plextor M5 is currently the strongest competitor to the Samsung but until prices on the Plextor drop from an astronomical £250, Samsung have an easy win despite not having priced the 840 particularly aggressively themselves.

Nomekop
Avatar level
8

Excellent

7 years ago.

Just the best 256G SSD for me!

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Speed Comparisons

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vs Samsung 840 Pro 256GB

1058 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 i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $394Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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