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Samsung MZ-7PD256BW

840 Pro 256GB

▲ 6420,544 ▼

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

VS

Average Bench: 93.6% (231st of 1011)

Based on 33,551 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: 93.6% Great: 117%

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 140MB/s
Avg. 4K Random Mixed IO Speed 38.7MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 55.1%. 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 296MB/s
Avg. Sustained Write Speed 305MB/s
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Average Bench

(Based on 33,551 samples)
Rank 23193.6%
Min Avg Max
347 Read 461 511
134 Write 370 485
214 Mixed 296 362
81.1 SusWrite 305 478
80.2% 358 MB/s
Min Avg Max
22.4 4K Read 30.5 36.5
44.1 4K Write 85 116
27.2 4K Mixed 38.7 47.6
141% 51.4 MB/s
Min Avg Max
189 DQ Read 337 386
123 DQ Write 258 334
88.7 DQ Mixed 140 175
148% 245 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
73GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 476 484 485 485 487 487 MB/s
118% Outstanding
Read 471
Write 299
Mixed 342
SusWrite 484
90% 399 MB/s
4K Read 36.9
4K Write 116
4K Mixed 47
177% 66.6 MB/s
DQ Read 378
DQ Write 318
DQ Mixed 145
164% 280 MB/s
238GB free
Firmware: DXM05B0Q
SusWrite @10s intervals: 454 466 468 472 473 472 MB/s
114% Outstanding
Read 508
Write 485
Mixed 329
SusWrite 468
101% 447 MB/s
4K Read 36.8
4K Write 86.3
4K Mixed 44.6
159% 55.9 MB/s
DQ Read 375
DQ Write 339
DQ Mixed 171
179% 295 MB/s
117GB free (System drive)
Firmware: DXM05B0Q
SusWrite @10s intervals: 425 461 457 457 459 453 MB/s
106% Outstanding
Read 461
Write 432
Mixed 290
SusWrite 452
92% 409 MB/s
4K Read 31.1
4K Write 85.3
4K Mixed 41.9
146% 52.8 MB/s
DQ Read 378
DQ Write 295
DQ Mixed 149
162% 274 MB/s
194GB free (System drive)
Firmware: DXM03B0Q
SusWrite @10s intervals: 349 410 409 305 304 294 MB/s
96.3% Outstanding
Read 472
Write 382
Mixed 266
SusWrite 345
82% 366 MB/s
4K Read 32.9
4K Write 81.7
4K Mixed 39.9
144% 51.5 MB/s
DQ Read 278
DQ Write 256
DQ Mixed 124
132% 220 MB/s
33,551 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 16,944,087 SSDs tested.

 Prices

Approx. $203 @ launch in Oct '12
AmazonUS $901 month
OutletPCUS $1301 day
EbayUS $24725 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 6,812 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 49%
Yacht
Desktop
Desktop 67%
Battle cruiser
Workstation
Workstation 46%
Yacht

Motherboard: Asus MAXIMUS VI HERO - $190

CPU
Core i7-4770KIntel  $293Bench 66%, 90,556 samples3,238x
Core i5-4670KIntel  $189Bench 65%, 75,777 samples1,429x
Core i7-4790KIntel  $348Bench 74%, 224,082 samples758x
GPU
GTX 970Nvidia  $399Bench 50%, 450,510 samples754x
GTX 1080Nvidia  $500Bench 101%, 513,425 samples639x
GTX 1070Nvidia  $400Bench 78%, 627,271 samples606x
SSD
840 Pro 256GBSamsung  $90Bench 94%, 33,551 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 69%, 12,087 samples240x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 54%, 18,412 samples192x
Vengeance Pro DDR3 2400 C11 2x8GBCorsairBench 61%, 22,865 samples169x
EDIT WITH CUSTOM PC BUILDER Value: 41% - Average Total price: $972

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) August 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
5,512

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
3,563

Excellent

4 months ago.

Owning it for almost 6 Years, still running very fast

CAN-User
Avatar level
3,002

Good

15 months ago.

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

POL-User
Avatar level
2,840

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
2,560

Average

13 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
2,501

Liked

2 years ago.

AUT-User
Avatar level
1,707

Liked

2 years ago.

Comment 

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

ZAF-User
Avatar level
1,608

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?

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

NZL-User
Avatar level
1,322

Liked

3 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
201

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 $143Nvidia GTX 1660 $220Samsung 850 Evo 250GB $86
Intel Core i5-9600K $219Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $102
AMD Ryzen 5 3600 $196AMD RX 580 $173Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $42G.SKILL Trident Z DDR4 3200 C14 4x16GB $799SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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