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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: 92% (192nd of 964)

Based on 22,769 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: 58%Average: 92% Great: 116%

Popular builds with this SSD

Excellent average bench

The Samsung 840 Pro 256GB averaged just 7.9% 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 138MB/s
Avg. 4K Random Mixed IO Speed 38.4MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 57.9%. 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 286MB/s
Avg. Sequential Mixed IO Speed 290MB/s
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Average Bench

(Based on 22,769 samples)
Rank 19292%
Min Avg Max
330 Read 455 510
135 Write 366 485
203 Mixed 290 361
79.1 SusWrite 286 476
78.1% 349 MB/s
Min Avg Max
21.2 4K Read 30.3 36.6
42 4K Write 85.3 118
24.3 4K Mixed 38.4 48.2
140% 51.3 MB/s
Min Avg Max
98.8 DQ Read 332 385
108 DQ Write 260 336
49.9 DQ Mixed 138 175
146% 243 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
43GB free
Firmware: DXM06B0Q
SusWrite @10s intervals: 473 474 478 475 476 168 MB/s
110% Outstanding
Read 499
Write 476
Mixed 360
SusWrite 424
99% 440 MB/s
4K Read 34
4K Write 90.5
4K Mixed 44.9
157% 56.5 MB/s
DQ Read 383
DQ Write 309
DQ Mixed 181
180% 291 MB/s
118GB free (System drive)
Firmware: DXM06B0Q
SusWrite @10s intervals: 423 445 426 373 402 402 MB/s
110% Outstanding
Read 455
Write 430
Mixed 312
SusWrite 412
90% 402 MB/s
4K Read 32.4
4K Write 116
4K Mixed 43.3
166% 64 MB/s
DQ Read 384
DQ Write 307
DQ Mixed 142
162% 278 MB/s
36GB free (System drive)
Firmware: DXM04B0Q
SusWrite @10s intervals: 186 192 197 193 178 152 MB/s
59.8% Above average
Read 289
Write 198
Mixed 178
SusWrite 183
47% 212 MB/s
4K Read 23.1
4K Write 46.8
4K Mixed 28.6
96% 32.8 MB/s
DQ Read 179
DQ Write 137
DQ Mixed 89.7
86% 135 MB/s
22,769 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 9,621,334 SSDs tested.

 Prices

Approx. $203 @ launch in Oct '12
EbayUS $27816 mins
OutletPCUS $3058 months
AmazonUS $32432 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 4,422 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 61%
Destroyer
Desktop
Desktop 72%
Battleship
Workstation
Workstation 53%
Yacht

Motherboard: Asus MAXIMUS VI HERO - $190

CPU
Core i7-4770KIntel  $398Bench 77%, 67,129 samples2,101x
Core i5-4670KIntel  $250Bench 78%, 52,963 samples931x
Core i7-4790KIntel  $365Bench 85%, 159,782 samples479x
GPU
GTX 970Nvidia  $300Bench 64%, 328,704 samples522x
GTX 1080Nvidia  $460Bench 123%, 332,411 samples436x
GTX 1070Nvidia  $330Bench 98%, 400,102 samples393x
SSD
840 Pro 256GBSamsung  $278Bench 92%, 22,769 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 66%, 8,456 samples144x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 54%, 13,491 samples122x
Savage DDR3 2400 C11 2x8GBHyperXBench 66%, 10,433 samples114x
EDIT WITH CUSTOM PC BUILDER Value: 62% - Good Total price: $1,166

Popular 840 Pro 256GB compatible motherboards:

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  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
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  • - Reports are generated and presented on userbenchmark.com.
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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
4,482

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
2,448

Good

6 months ago.

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

POL-User
Avatar level
2,378

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
2,088

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
2,075

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
1,282

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
1,154

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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 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 $330Samsung 850 Evo 250GB $85
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $243Samsung 850 Evo 500GB $102
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair 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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