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Samsung MZ-7PD256BW

840 Pro 256GB

▲ 6420,545 ▼

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

Average Bench: 93.6% (233rd of 1011)

Based on 38,435 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]

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Poor: 65%Average: 93.6% Great: 116%

Popular builds with this SSD

Excellent average bench

The Samsung 840 Pro 256GB averaged just 6.3% 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 141MB/s
Avg. 4K Random Mixed IO Speed 38.9MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 51.1%. 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 297MB/s
Avg. Sustained Write Speed 304MB/s
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Average Bench

(Based on 38,435 samples)
Rank 23393.6%
Min Avg Max
345 Read 460 509
139 Write 374 485
213 Mixed 297 358
92.1 SusWrite 304 468
80.5% 359 MB/s
Min Avg Max
22.6 4K Read 30.8 36.5
42.3 4K Write 84.1 116
27 4K Mixed 38.9 47.5
141% 51.3 MB/s
Min Avg Max
159 DQ Read 332 385
129 DQ Write 261 331
84.7 DQ Mixed 141 175
148% 245 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
184GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 444 457 459 466 471 478 MB/s
109% Outstanding
Read 501
Write 480
Mixed 359
SusWrite 462
101% 451 MB/s
4K Read 32.3
4K Write 81.7
4K Mixed 42.2
146% 52.1 MB/s
DQ Read 373
DQ Write 328
DQ Mixed 174
179% 292 MB/s
60GB free (System drive)
Firmware: DXM06B0Q
SusWrite @10s intervals: 245 406 448 471 408 399 MB/s
107% Outstanding
Read 506
Write 472
Mixed 349
SusWrite 396
97% 431 MB/s
4K Read 34
4K Write 89.9
4K Mixed 42.8
154% 55.6 MB/s
DQ Read 373
DQ Write 286
DQ Mixed 159
165% 273 MB/s
38,435 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 18,505,215 SSDs tested.

 Prices

Approx. $203 @ launch in Oct '12
OutletPCUS $11015 hrs
AmazonUS $2421 hr
EbayUS $30021 mins
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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 7,247 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 49%
Yacht
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 48%
Yacht

Motherboard: Asus MAXIMUS VI HERO - $190

CPU
Core i7-4770KIntel  $293Bench 69%, 91,338 samples3,450x
Core i5-4670KIntel  $280Bench 66%, 82,101 samples1,494x
Core i7-4790KIntel  $348Bench 75%, 239,503 samples827x
GPU
GTX 970Nvidia  $399Bench 50%, 504,038 samples777x
GTX 1080Nvidia  $528Bench 100%, 440,934 samples665x
GTX 1070Nvidia  $359Bench 78%, 613,412 samples645x
SSD
840 Pro 256GBSamsung  $110Bench 94%, 38,435 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 68%, 12,557 samples247x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 55%, 21,981 samples207x
Vengeance Pro DDR3 2400 C11 2x8GBCorsairBench 62%, 23,609 samples176x
EDIT WITH CUSTOM PC BUILDER Value: 41% - Average Total price: $992

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.

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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.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) October 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

SSDrivePro
Avatar level
1,352

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 6 years ago.
USA-User
Avatar level
5,662

Good (edit your comment) Add link

2 years 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
3,675

Excellent

6 months ago.

Owning it for almost 6 Years, still running very fast

CAN-User
Avatar level
3,058

Good

17 months ago.

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

POL-User
Avatar level
2,906

Good

2 years ago.

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

IND-User
Avatar level
2,640

Average

14 months 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.

ESP-User
Avatar level
2,573

Liked

2 years ago.

AUT-User
Avatar level
1,759

Liked

2 years ago.

Comment 

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

ZAF-User
Avatar level
1,700

Poor

3 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?

NZL-User
Avatar level
1,360

Liked

3 years ago.

Comment 

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

SSDrivePro
Avatar level
1,352

Very good

6 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

Rand
Avatar level
221

Very good

6 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

5 years ago.

Just the best 256G SSD for me!

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Speed Comparisons

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vs Samsung 840 Pro 256GB

1011 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 i5-9400F $145Nvidia GTX 1660 $210Samsung 850 Evo 250GB $73
Intel Core i5-9600K $240Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $107
Intel Core i7-9700K $350Nvidia RTX 2060 $349Samsung 850 Pro 256GB $200
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 64GB $88
Seagate Barracuda 3TB (2016) $78G.SKILL Trident Z DDR4 3200 C14 4x16GB $612SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $70SanDisk Ultra Fit 32GB $14
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