TEST
YOUR SSD
ADD TO PC
BUILD

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: 92.4% (204th of 980)

Based on 27,966 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]

ADVERTISEMENT
Poor: 64%Average: 92.4% Great: 117%

Popular builds with this SSD

Excellent average bench

The Samsung 840 Pro 256GB averaged just 7.5% 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 38.7MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Pro 256GB is 52.5%. 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 289MB/s
Avg. Sequential Mixed IO Speed 291MB/s
ADVERTISEMENT

Average Bench

(Based on 27,966 samples)
Rank 20492.4%
Min Avg Max
340 Read 454 510
137 Write 359 480
213 Mixed 291 359
81 SusWrite 289 475
77.9% 348 MB/s
Min Avg Max
21.6 4K Read 30.5 36.7
45.4 4K Write 85.8 120
26.8 4K Mixed 38.7 47.8
141% 51.7 MB/s
Min Avg Max
102 DQ Read 332 385
124 DQ Write 259 331
43 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%
49GB free (System drive)
Firmware: DXM06B0Q
SusWrite @10s intervals: 357 170 118 109 104 100 MB/s
83.9% Excellent
Read 507
Write 248
Mixed 311
SusWrite 160
68% 306 MB/s
4K Read 33.6
4K Write 102
4K Mixed 34.9
150% 56.8 MB/s
DQ Read 268
DQ Write 121
DQ Mixed 108
103% 165 MB/s
27,966 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 11,464,199 SSDs tested.

 Prices

Approx. $203 @ launch in Oct '12
OutletPCUS $12021 hrs
AmazonUS $12018 mins
EbayUS $28916 secs
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 5,156 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  $434Bench 77%, 75,650 samples2,450x
Core i5-4670KIntel  $270Bench 79%, 65,380 samples1,082x
Core i7-4790KIntel  $365Bench 85%, 188,499 samples565x
GPU
GTX 970Nvidia  $374Bench 63%, 369,420 samples583x
GTX 1080Nvidia  $498Bench 124%, 395,889 samples493x
GTX 1070Nvidia  $320Bench 97%, 468,301 samples468x
SSD
840 Pro 256GBSamsung  $120Bench 92%, 27,966 samples1x
RAM
TridentX DDR3 2400 C10 2x8GBG.SKILLBench 68%, 10,524 samples174x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 55%, 14,534 samples143x
Vengeance Pro DDR3 2400 C11 2x8GBCorsairBench 61%, 18,260 samples133x
EDIT WITH CUSTOM PC BUILDER Value: 66% - Good Total price: $1,118

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 Workstation

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

ADVERTISEMENT

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
4,770

Good (edit your comment) Add link

19 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
2,622

Good

8 months ago.

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

POL-User
Avatar level
2,540

Good

21 months ago.

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

IND-User
Avatar level
2,232

Average

5 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
2,201

Liked

20 months ago.

AUT-User
Avatar level
1,523

Liked

23 months ago.

Comment 

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

ZAF-User
Avatar level
1,370

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

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

NZL-User
Avatar level
1,198

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!

Your
opinion?
▲Like ▼Dislike
Ready to retire
Age: 6 years

Speed Comparisons

vs Samsung 850 Evo 250GB
vs Samsung 850 Pro 256GB
vs Crucial MX500 250GB
vs HyperX Savage 240GB
vs Samsung 860 Evo 250GB
vs Crucial MX300 275GB
vs Crucial MX200 250GB
vs SanDisk Extreme Pro 240GB
vs Crucial MX100 256GB

980 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 i7-8700K $360Nvidia GTX 1070 $320Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $110
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $115SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $780SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $125SanDisk Extreme 16GB $22
Today's hottest
Amazon Ebay Newegg
deals
CPU GPU SSD HDD USB RAM MBD
Test your PC Build a PC
FPS Estimates
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback