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PlextorPX-256M6V
$110
SamsungMZ-7PD256BW
▲ 52352 ▼
 $110 

Controller: SMI 2246. NAND Memory: Toshiba A15nm MLC. Release date: Q3 2015.

VS
▲ 5420,555 ▼

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

Effective Speed 
+9%
Real World Speed
Performance profile from 73,554 user samples
Benchmark your SSD here
435 User Benchmarks
Best Bench: 106% 145GB free
Worst Bench: 64% 187GB free
Poor: 64% Great: 106%
SPEED RANK: 369th / 1072
73,119 User Benchmarks
Best Bench: 116% 238GB free
Worst Bench: 68% 11GB free (System drive)
Poor: 68% Great: 116%
SPEED RANK: 279th / 1072
Effective Speed
Effective SSD Speed 		87.2 % 95 % Slightly faster effective speed.
+9%
Average Score 
+8%
Read
Avg. Sequential Read Speed 		479 MB/s +4% 459 MB/s
Write
Avg. Sequential Write Speed 		332 MB/s 367 MB/s Faster write speed.
+11%
4K Read
Avg. 4K Random Read Speed 		28.7 MB/s 31 MB/s Slightly faster random read.
+8%
4K Write
Avg. 4K Random Write Speed 		77 MB/s 85.6 MB/s Faster random write.
+11%
Mixed
Avg. Sequential Mixed IO Speed 		321 MB/s Slightly faster mixed IO speed.
+6% 		303 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		35.5 MB/s 39.5 MB/s Faster random mixed IO.
+11%
SusWrite
Avg. Sustained Write Speed 		255 MB/s 312 MB/s Faster sustained write speed.
+22%
Peak Score 
+9%
Read
Peak Sequential Read Speed 		521 MB/s +2% 510 MB/s
Write
Peak Sequential Write Speed 		350 MB/s 480 MB/s Much faster peak write speed.
+37%
4K Read
Peak 4K Random Read Speed 		35.5 MB/s 36.1 MB/s +2%
4K Write
Peak 4K Random Write Speed 		110 MB/s 114 MB/s +4%
Mixed
Peak Sequential Mixed IO Speed 		415 MB/s Faster peak mixed IO speed.
+13% 		368 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		48.5 MB/s +2% 47.6 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		345 MB/s 477 MB/s Much faster peak sustained write speed.
+38%
Value & Sentiment 
+∞%
Market Share
Based on 75,724,994 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.07 % Insanely higher market share.
+∞%
Value
Value For Money 		10.7 % Much better value.
+38% 		7.72 %
User Rating
UBM User Rating 		52 % 54 % +4%
Price
Price (score) 		$110 Much cheaper.
+42% 		$190
Nice To Haves 
+8%
Age
Newest 		105 Months More recent.
+24% 		138 Months
DQ Read
Peak 4K-64Thread Read Speed 		318 MB/s 385 MB/s Faster peak deep queue read.
+21%
DQ Write
Peak 4K-64Thread Write Speed 		321 MB/s 334 MB/s +4%
AS-SSD Total
AS-SSD Total Score 		1,084 Pts 1,221 Pts Stronger server IO.
+13%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		208 MB/s Faster peak deep queue mixed IO.
+18% 		176 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		239 MB/s 346 MB/s Much faster deep queue read.
+45%
ADQ Write
Avg. 4K-64Thread Write Speed 		237 MB/s 262 MB/s Faster deep queue write.
+11%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		126 MB/s 147 MB/s Faster deep queue mixed IO.
+17%
Specifications 
Capacity
Capacity 		256GB 256GB
Conclusion 
Average Bench 87.2%
Average Bench 95%
ADVERTISEMENT

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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User Builds 
435
73,119
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Solid State Drive Rankings (Price vs Performance) April 2024 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.
How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute

Welcome to our 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

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
  • - SkillBench (space shooter) tests user input accuracy
  • - 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

 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 i5-13600K $274Nvidia RTX 4060 $295Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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