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Samsung MZ-7PD256BW

840 Pro 256GB

▲ 6320,542 ▼

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

VS

Average Bench: 91.8% (193rd of 964)

Based on 23,391 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: 62%Average: 91.8% Great: 117%

Popular builds with this SSD

Excellent average bench

The Samsung 840 Pro 256GB averaged just 8.1% 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 139MB/s
Avg. 4K Random Mixed IO Speed 38.6MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 54.7%. This is a relatively wide range which indicates that the Samsung 840 Pro 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 284MB/s
Avg. Sequential Mixed IO Speed 290MB/s
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Average Bench

(Based on 23,391 samples)
Rank 19391.8%
Min Avg Max
332 Read 453 510
128 Write 357 484
194 Mixed 290 363
76.5 SusWrite 284 478
77.5% 346 MB/s
Min Avg Max
21.8 4K Read 30.3 36.6
41.7 4K Write 84.5 119
26 4K Mixed 38.6 47.9
140% 51.1 MB/s
Min Avg Max
93.3 DQ Read 333 386
116 DQ Write 257 331
70.8 DQ Mixed 139 175
147% 243 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
192GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 440 442 447 445 446 458 MB/s
103% Outstanding
Read 462
Write 436
Mixed 337
SusWrite 446
95% 420 MB/s
4K Read 30.7
4K Write 72.7
4K Mixed 39.7
136% 47.7 MB/s
DQ Read 362
DQ Write 317
DQ Mixed 170
174% 283 MB/s
76GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 184 115 114 115 114 105 MB/s
91% Outstanding
Read 481
Write 410
Mixed 333
SusWrite 124
75% 337 MB/s
4K Read 33.9
4K Write 107
4K Mixed 41.9
162% 60.8 MB/s
DQ Read 368
DQ Write 293
DQ Mixed 170
171% 277 MB/s
58GB free (System drive)
Firmware: DXM05B0Q
SusWrite @10s intervals: 183 168 161 151 157 141 MB/s
82.8% Excellent
Read 358
Write 249
Mixed 248
SusWrite 160
57% 254 MB/s
4K Read 33.8
4K Write 87.6
4K Mixed 39
148% 53.5 MB/s
DQ Read 375
DQ Write 232
DQ Mixed 168
162% 258 MB/s
14GB free (System drive)
Firmware: DXM06B0Q
SusWrite @10s intervals: 104 88 101 88 87 84 MB/s
70.2% Very good
Read 422
Write 136
Mixed 210
SusWrite 92
47% 215 MB/s
4K Read 29.7
4K Write 68.2
4K Mixed 33.8
124% 43.9 MB/s
DQ Read 264
DQ Write 161
DQ Mixed 107
108% 177 MB/s
23,391 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 9,688,995 SSDs tested.

 Prices

Approx. $203 @ launch in Oct '12
EbayUS $28915 mins
OutletPCUS $3058 months
AmazonUS $32430 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 4,456 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 61%
Destroyer
Desktop
Desktop 71%
Battleship
Workstation
Workstation 52%
Yacht

Motherboard: Asus MAXIMUS VI HERO - $190

CPU
Core i7-4770KIntel  $400Bench 76%, 61,960 samples2,122x
Core i5-4670KIntel  $250Bench 78%, 56,491 samples938x
Core i7-4790KIntel  $324Bench 85%, 171,890 samples481x
GPU
GTX 970Nvidia  $300Bench 64%, 333,471 samples524x
GTX 1080Nvidia  $460Bench 123%, 352,399 samples443x
GTX 1070Nvidia  $340Bench 99%, 416,626 samples398x
SSD
840 Pro 256GBSamsung  $289Bench 92%, 23,391 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 66%, 8,451 samples145x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 54%, 13,170 samples123x
Vengeance Pro DDR3 2400 C11 2x8GBCorsairBench 61%, 17,958 samples117x
EDIT WITH CUSTOM PC BUILDER Value: 61% - Good Total price: $1,179

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) November 2018 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
4,494

Good (edit your comment) Add link

17 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

CAN-User
Avatar level
2,450

Good

6 months ago.

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

POL-User
Avatar level
2,388

Good

19 months ago.

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

IND-User
Avatar level
2,096

Average

3 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
2,083

Liked

17 months ago.

AUT-User
Avatar level
1,445

Liked

21 months ago.

Comment 

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

SSDrivePro
Avatar level
1,352

Very good

5 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

ZAF-User
Avatar level
1,290

Poor

2 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
1,156

Liked

2 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
145

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

4 years ago.

Just the best 256G SSD for me!

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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 i7-8700K $359Nvidia GTX 1070 $340Samsung 850 Evo 250GB $77
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $234Samsung 850 Evo 500GB $100
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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