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AdataASP900S3-256GM-C
SamsungMZ-7KE256BW
▲ 505 ▼

Controller: LSI SandForce SF2281. NAND Flash: Intel Micron Synchronous 25nm MLC. Release date ≤ Q1 2014.

VS
▲ 5441,222 ▼

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

Effective Speed 
+38%
Real World Speed
Performance profile from 151,359 user samples
Benchmark your SSD here
9,430 User Benchmarks
Best Bench: 89% 187GB free
Worst Bench: 53% 6GB free
Poor: 53% Great: 89%
SPEED RANK: 595th / 1072
141,929 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 71% 71GB free (System drive)
Poor: 71% Great: 124%
SPEED RANK: 248th / 1072
Effective Speed
Effective SSD Speed 		74 % 102 % Much faster effective speed.
+38%
Average Score 
+40%
Read
Avg. Sequential Read Speed 		353 MB/s 469 MB/s Much faster read speed.
+33%
Write
Avg. Sequential Write Speed 		248 MB/s 396 MB/s Much faster write speed.
+60%
4K Read
Avg. 4K Random Read Speed 		27.2 MB/s 33.9 MB/s Faster random read.
+25%
4K Write
Avg. 4K Random Write Speed 		80.3 MB/s 89.6 MB/s Faster random write.
+12%
Mixed
Avg. Sequential Mixed IO Speed 		264 MB/s 334 MB/s Faster mixed IO speed.
+27%
4K Mixed
Avg. 4K Random Mixed IO Speed 		34.9 MB/s 44.1 MB/s Faster random mixed IO.
+26%
SusWrite
Avg. Sustained Write Speed 		177 MB/s 346 MB/s Hugely faster sustained write speed.
+95%
Peak Score 
+41%
Read
Peak Sequential Read Speed 		419 MB/s 515 MB/s Faster peak read speed.
+23%
Write
Peak Sequential Write Speed 		303 MB/s 488 MB/s Much faster peak write speed.
+61%
4K Read
Peak 4K Random Read Speed 		33.9 MB/s 43.6 MB/s Faster peak random read.
+29%
4K Write
Peak 4K Random Write Speed 		111 MB/s 125 MB/s Faster peak random write.
+13%
Mixed
Peak Sequential Mixed IO Speed 		299 MB/s 383 MB/s Faster peak mixed IO speed.
+28%
4K Mixed
Peak 4K Random Mixed IO Speed 		44.1 MB/s 56.7 MB/s Faster peak random mixed IO.
+29%
SusWrite
Peak Sequential Sustained Write 60s Average 		236 MB/s 484 MB/s Hugely faster peak sustained write speed.
+105%
Value & Sentiment 
+238%
Market Share
Based on 75,636,393 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.08 % Hugely higher market share.
+700%
Value
Value For Money 		4.27 % 12.1 % Hugely better value.
+183%
User Rating
UBM User Rating 		50 % 54 % Slightly more popular.
+8%
Price
Price (score) 		$300 $115 Much cheaper.
+62%
Nice To Haves 
+39%
Age
Newest 		122+ Months 117 Months +4%
DQ Read
Peak 4K-64Thread Read Speed 		290 MB/s 388 MB/s Much faster peak deep queue read.
+34%
DQ Write
Peak 4K-64Thread Write Speed 		264 MB/s 361 MB/s Much faster peak deep queue write.
+37%
AS-SSD Total
AS-SSD Total Score 		965 Pts 1,280 Pts Much stronger server IO.
+33%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		247 MB/s 356 MB/s Much faster peak deep queue mixed IO.
+44%
ADQ Read
Avg. 4K-64Thread Read Speed 		213 MB/s 344 MB/s Much faster deep queue read.
+62%
ADQ Write
Avg. 4K-64Thread Write Speed 		216 MB/s 282 MB/s Much faster deep queue write.
+31%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		176 MB/s 295 MB/s Much faster deep queue mixed IO.
+68%
Specifications 
Capacity
Capacity 		256GB 256GB
Conclusion 
Average Bench 74%
Average Bench 102%
ADVERTISEMENT

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

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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 $273Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $186Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $34Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair 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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