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AdataASX900S3-256GM-C
SamsungMZ-75E250B
▲ 531,260 ▼

Controller: LSI SandForce SF2281VB1-SDC. Flash Memory: Intel Micron Synchronous 25nm MLC. Release date: Q1 2012.

VS
▲ 5640,703 ▼

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

Effective Speed 
+35%
Real World Speed
Performance profile from 958,317 user samples
Benchmark your SSD here
6,726 User Benchmarks
Best Bench: 90% 238GB free
Worst Bench: 58% 1GB free
Poor: 58% Great: 90%
SPEED RANK: 542nd / 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 		76.6 % 103 % Much faster effective speed.
+35%
Average Score 
+38%
Read
Avg. Sequential Read Speed 		368 MB/s 466 MB/s Faster read speed.
+27%
Write
Avg. Sequential Write Speed 		256 MB/s 434 MB/s Much faster write speed.
+70%
4K Read
Avg. 4K Random Read Speed 		28.3 MB/s 39.4 MB/s Much faster random read.
+39%
4K Write
Avg. 4K Random Write Speed 		79.7 MB/s 94.6 MB/s Faster random write.
+19%
Mixed
Avg. Sequential Mixed IO Speed 		270 MB/s 370 MB/s Much faster mixed IO speed.
+37%
4K Mixed
Avg. 4K Random Mixed IO Speed 		35.2 MB/s 52.2 MB/s Much faster random mixed IO.
+48%
SusWrite
Avg. Sustained Write Speed 		190 MB/s 247 MB/s Much faster sustained write speed.
+30%
Peak Score 
+38%
Read
Peak Sequential Read Speed 		423 MB/s 507 MB/s Faster peak read speed.
+20%
Write
Peak Sequential Write Speed 		298 MB/s 492 MB/s Much faster peak write speed.
+65%
4K Read
Peak 4K Random Read Speed 		34.7 MB/s 47.6 MB/s Much faster peak random read.
+37%
4K Write
Peak 4K Random Write Speed 		111 MB/s 129 MB/s Faster peak random write.
+16%
Mixed
Peak Sequential Mixed IO Speed 		302 MB/s 416 MB/s Much faster peak mixed IO speed.
+38%
4K Mixed
Peak 4K Random Mixed IO Speed 		43.3 MB/s 64.6 MB/s Much faster peak random mixed IO.
+49%
SusWrite
Peak Sequential Sustained Write 60s Average 		236 MB/s 328 MB/s Much faster peak sustained write speed.
+39%
Value & Sentiment 
+1,784%
Market Share
Based on 75,636,585 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.71 % Insanely higher market share.
+7,000%
Value
Value For Money 		6.96 % 13.4 % Hugely better value.
+92%
User Rating
UBM User Rating 		53 % 56 % Slightly more popular.
+6%
Price
Price (score) 		$164 $100 Much cheaper.
+39%
Nice To Haves 
+39%
Age
Newest 		145 Months 112 Months More recent.
+23%
DQ Read
Peak 4K-64Thread Read Speed 		298 MB/s 386 MB/s Faster peak deep queue read.
+30%
DQ Write
Peak 4K-64Thread Write Speed 		264 MB/s 362 MB/s Much faster peak deep queue write.
+37%
AS-SSD Total
AS-SSD Total Score 		978 Pts 1,290 Pts Much stronger server IO.
+32%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		256 MB/s 370 MB/s Much faster peak deep queue mixed IO.
+45%
ADQ Read
Avg. 4K-64Thread Read Speed 		245 MB/s 354 MB/s Much faster deep queue read.
+44%
ADQ Write
Avg. 4K-64Thread Write Speed 		219 MB/s 308 MB/s Much faster deep queue write.
+41%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		194 MB/s 320 MB/s Much faster deep queue mixed IO.
+65%
Specifications 
Capacity
Capacity 		256GB 250GB
Conclusion 
Average Bench 76.6%
Average Bench 103%
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The SX900 and SX910 are both Sandforce 2881 based SSDs from Adata. The only difference between them is their warranty period: 5 years for the SX910 vs 3 years for the SX900. Both drives utilize Intel-Micron 25Nm MLC so the differences must be at a "sub-atomic" level, or at least beyond the scope of the specs. Once again as with all Sandforce 2881 based drives performance is skewed in favour of reads over writes. With a peak sequential read of 510 MB/s and corresponding sequential write of 309 MB/s the SX series does not break any records but, like all SSDs, they do offer speeds way in excess of mechanical hard drives. Overall performance lags the SSD group leaders by around 40% and there are far faster, cheaper and newer (non-Sandforce) alternatives such as the Samsung 840 Evo or the Sandisk Ultra Plus available. [Jan '14 SSDrivePro]

MORE DETAILS

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]

MORE DETAILS

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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 $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) $39Corsair 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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