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AdataASX900S3-512GM-C
AdataASP900S3-128GM-C
▲ 503 ▼

Controller: LSI SandForce SF2281VB1-SDC. Flash Memory: Intel Micron Synchronous 25nm MLC. Release date ≤ Q1 2014.

VS
▲ 511,619 ▼

Controller: LSI SandForce SF2281. NAND Flash: Intel Micron Synchronous 25nm MLC. Release date: Q1 2012.

Effective Speed 
+17%
Real World Speed
Performance profile from 4,367 user samples
Benchmark your SSD here
1,547 User Benchmarks
Best Bench: 69% 476GB free
Worst Bench: 47% 384GB free (System drive)
Poor: 47% Great: 69%
SPEED RANK: 817th / 1072
2,820 User Benchmarks
Best Bench: 80% 50GB free
Worst Bench: 57% 13GB free (System drive)
Poor: 57% Great: 80%
SPEED RANK: 689th / 1072
Effective Speed
Effective SSD Speed 		58.6 % 68.6 % Faster effective speed.
+17%
Average Score 
+35%
Read
Avg. Sequential Read Speed 		394 MB/s +4% 380 MB/s
Write
Avg. Sequential Write Speed 		239 MB/s Much faster write speed.
+64% 		146 MB/s
4K Read
Avg. 4K Random Read Speed 		24.4 MB/s 27.5 MB/s Faster random read.
+13%
4K Write
Avg. 4K Random Write Speed 		17.6 MB/s 81.6 MB/s Hugely faster random write.
+364%
Mixed
Avg. Sequential Mixed IO Speed 		269 MB/s Much faster mixed IO speed.
+42% 		190 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		20.6 MB/s 33.6 MB/s Much faster random mixed IO.
+63%
SusWrite
Avg. Sustained Write Speed 		224 MB/s Hugely faster sustained write speed.
+85% 		121 MB/s
Peak Score 
+34%
Read
Peak Sequential Read Speed 		466 MB/s Slightly faster peak read speed.
+9% 		428 MB/s
Write
Peak Sequential Write Speed 		342 MB/s Hugely faster peak write speed.
+104% 		168 MB/s
4K Read
Peak 4K Random Read Speed 		29.9 MB/s 32 MB/s Slightly faster peak random read.
+7%
4K Write
Peak 4K Random Write Speed 		21.8 MB/s 116 MB/s Hugely faster peak random write.
+432%
Mixed
Peak Sequential Mixed IO Speed 		337 MB/s Much faster peak mixed IO speed.
+56% 		216 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		25.4 MB/s 41.1 MB/s Much faster peak random mixed IO.
+62%
SusWrite
Peak Sequential Sustained Write 60s Average 		290 MB/s Hugely faster peak sustained write speed.
+96% 		148 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 75,784,984 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.01 % Insanely higher market share.
+∞%
Value
Value For Money 		8.04 % 10.7 % Much better value.
+33%
User Rating
UBM User Rating 		50 % 51 % +2%
Price
Price (score) 		$189 $40 Much cheaper.
+79%
Nice To Haves 
+8%
Age
Newest 		121+ Months More recent.
+17% 		146 Months
DQ Read
Peak 4K-64Thread Read Speed 		229 MB/s Faster peak deep queue read.
+15% 		199 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		112 MB/s 166 MB/s Much faster peak deep queue write.
+48%
AS-SSD Total
AS-SSD Total Score 		635 Pts 712 Pts Stronger server IO.
+12%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		145 MB/s 171 MB/s Faster peak deep queue mixed IO.
+18%
ADQ Read
Avg. 4K-64Thread Read Speed 		208 MB/s Much faster deep queue read.
+30% 		160 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		97.6 MB/s 143 MB/s Much faster deep queue write.
+47%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		121 MB/s 125 MB/s +3%
Specifications 
Capacity
Capacity 		512GB 128GB
Conclusion 
Average Bench 58.6%
Average Bench 68.6%
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The 128GB Adata Premier Pro SP900 has peak and average sequential read/write speeds of 496/166 and 175/106 MB/s. The average speeds are significantly worse than peak which indicates that the SP900 has an unstable performance profile. Additionally, the peak write speed of 166 MB/s is 90% below the group leaders. In terms of small file 4K read/write speeds things are a little better where the SP900 achieved peak and average scores of 23/83 and 17/29 MB/s. These 4K figures still lag the group leaders by around 40%. The Overall effective speed for the SP900 measures 340 MB/s, the worst I have seen to date on a 128GB SSD. The SP900 is not particularly well priced, and therefore represents poor value for money. There are both faster and cheaper 128GB alternatives available amongst the group leaders. [Feb '14 SSDrivePro]

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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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  • - 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
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 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?
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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $254Nvidia RTX 4060 $300Crucial MX500 250GB $39
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $163Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $37SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $79G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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