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SanDiskSDSSDXPS-480G-G25
AdataASP900S3-128GM-C
▲ 541,098 ▼

Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC. Release date: Q2 2014.

VS
▲ 511,619 ▼

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

Effective Speed 
+36%
Real World Speed
Performance profile from 12,070 user samples
Benchmark your SSD here
9,250 User Benchmarks
Best Bench: 114% 243GB free
Worst Bench: 62% 382GB free
Poor: 62% Great: 114%
SPEED RANK: 302nd / 1080
2,820 User Benchmarks
Best Bench: 80% 50GB free
Worst Bench: 57% 13GB free (System drive)
Poor: 57% Great: 80%
SPEED RANK: 697th / 1080
Effective Speed
Effective SSD Speed 		93.2 % Much faster effective speed.
+36% 		68.6 %
Average Score 
+65%
Read
Avg. Sequential Read Speed 		461 MB/s Faster read speed.
+21% 		380 MB/s
Write
Avg. Sequential Write Speed 		415 MB/s Hugely faster write speed.
+184% 		146 MB/s
4K Read
Avg. 4K Random Read Speed 		28.9 MB/s Slightly faster random read.
+5% 		27.5 MB/s
4K Write
Avg. 4K Random Write Speed 		73.7 MB/s 81.6 MB/s Faster random write.
+11%
Mixed
Avg. Sequential Mixed IO Speed 		267 MB/s Much faster mixed IO speed.
+41% 		190 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		33.6 MB/s 33.6 MB/s
SusWrite
Avg. Sustained Write Speed 		381 MB/s Hugely faster sustained write speed.
+215% 		121 MB/s
Peak Score 
+70%
Read
Peak Sequential Read Speed 		509 MB/s Faster peak read speed.
+19% 		428 MB/s
Write
Peak Sequential Write Speed 		480 MB/s Hugely faster peak write speed.
+186% 		168 MB/s
4K Read
Peak 4K Random Read Speed 		35.5 MB/s Faster peak random read.
+11% 		32 MB/s
4K Write
Peak 4K Random Write Speed 		114 MB/s 116 MB/s +2%
Mixed
Peak Sequential Mixed IO Speed 		313 MB/s Much faster peak mixed IO speed.
+45% 		216 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		42.8 MB/s +4% 41.1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		479 MB/s Hugely faster peak sustained write speed.
+224% 		148 MB/s
Value & Sentiment 
+42%
Market Share
Based on 77,055,943 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.01 %
Value
Value For Money 		30.9 % Hugely better value.
+190% 		10.7 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$55 $40 Cheaper.
+27%
Nice To Haves 
+60%
Age
Newest 		123 Months More recent.
+18% 		150 Months
DQ Read
Peak 4K-64Thread Read Speed 		376 MB/s Hugely faster peak deep queue read.
+89% 		199 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		341 MB/s Hugely faster peak deep queue write.
+105% 		166 MB/s
AS-SSD Total
AS-SSD Total Score 		1,213 Pts Much stronger server IO.
+70% 		712 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		164 MB/s 171 MB/s +4%
ADQ Read
Avg. 4K-64Thread Read Speed 		321 MB/s Hugely faster deep queue read.
+101% 		160 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s Hugely faster deep queue write.
+83% 		143 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		148 MB/s Faster deep queue mixed IO.
+18% 		125 MB/s
Specifications 
Capacity
Capacity 		480GB 128GB
Conclusion 
Average Bench 93.2%
Average Bench 68.6%

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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Solid State Drive Rankings (Price vs Performance) September 2024 SSD Rankings

Welcome to our 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]

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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  • - CPU tests include: integer, floating and string
  • - GPU tests include: six 3D game simulations
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  • - SkillBench (space shooter) tests user input accuracy
  • - Reports are generated and presented on userbenchmark.com
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  • - See speed test results from other users
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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?
How is the AS SSD read score calculated?
How is the AS SSD total score calculated?
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
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