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AdataASU800SS-256GT-C
SamsungMZ-75E250B
▲ 54510 ▼

Controller: Silicon Motion SM2258. Flash Memory: Micron 3D TLC NAND. Release date: Q3 2016.

VS
▲ 5640,703 ▼

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND. Release date: Q4 2014.

Effective Speed 
+14%
Real World Speed
Performance profile from 992,316 user samples
Benchmark your SSD here
40,725 User Benchmarks
Best Bench: 118% 159GB free (System drive)
Worst Bench: 60% 123GB free (System drive)
Poor: 60% Great: 118%
SPEED RANK: 317th / 1072
951,591 User Benchmarks
Best Bench: 124% 140GB free
Worst Bench: 72% 233GB free
Poor: 72% Great: 124%
SPEED RANK: 243rd / 1072
Effective Speed
Effective SSD Speed 		90.7 % 103 % Faster effective speed.
+14%
Average Score 
+13%
Read
Avg. Sequential Read Speed 		469 MB/s +1% 466 MB/s
Write
Avg. Sequential Write Speed 		370 MB/s 434 MB/s Faster write speed.
+17%
4K Read
Avg. 4K Random Read Speed 		29.8 MB/s 39.4 MB/s Much faster random read.
+32%
4K Write
Avg. 4K Random Write Speed 		81.1 MB/s 94.6 MB/s Faster random write.
+17%
Mixed
Avg. Sequential Mixed IO Speed 		356 MB/s 370 MB/s +4%
4K Mixed
Avg. 4K Random Mixed IO Speed 		41.4 MB/s 52.2 MB/s Faster random mixed IO.
+26%
SusWrite
Avg. Sustained Write Speed 		262 MB/s Slightly faster sustained write speed.
+6% 		247 MB/s
Peak Score 
+0%
Read
Peak Sequential Read Speed 		516 MB/s +2% 507 MB/s
Write
Peak Sequential Write Speed 		471 MB/s 492 MB/s +4%
4K Read
Peak 4K Random Read Speed 		40 MB/s 47.6 MB/s Faster peak random read.
+19%
4K Write
Peak 4K Random Write Speed 		120 MB/s 129 MB/s Slightly faster peak random write.
+8%
Mixed
Peak Sequential Mixed IO Speed 		443 MB/s Slightly faster peak mixed IO speed.
+6% 		416 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		55.8 MB/s 64.6 MB/s Faster peak random mixed IO.
+16%
SusWrite
Peak Sequential Sustained Write 60s Average 		464 MB/s Much faster peak sustained write speed.
+41% 		328 MB/s
Value & Sentiment 
+314%
Market Share
Based on 75,633,423 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.05 % 0.72 % Insanely higher market share.
+1,340%
Value
Value For Money 		19 % Much better value.
+42% 		13.4 %
User Rating
UBM User Rating 		54 % 56 % +4%
Price
Price (score) 		$54 Much cheaper.
+46% 		$100
Nice To Haves 
+17%
Age
Newest 		91 Months More recent.
+19% 		112 Months
DQ Read
Peak 4K-64Thread Read Speed 		381 MB/s 386 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed 		360 MB/s 362 MB/s +1%
AS-SSD Total
AS-SSD Total Score 		1,254 Pts 1,290 Pts +3%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		279 MB/s 370 MB/s Much faster peak deep queue mixed IO.
+33%
ADQ Read
Avg. 4K-64Thread Read Speed 		273 MB/s 354 MB/s Faster deep queue read.
+30%
ADQ Write
Avg. 4K-64Thread Write Speed 		271 MB/s 308 MB/s Faster deep queue write.
+14%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		187 MB/s 320 MB/s Much faster deep queue mixed IO.
+71%
Specifications 
Capacity
Capacity 		256GB 250GB
Conclusion 
Average Bench 90.7%
Average Bench 103%
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The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders. [Dec '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.

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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
  • - 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 $132Nvidia 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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