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SanDiskSDSSDXPS-240G
AdataASP900S3-128GM-C
▲ 544,013 ▼

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 
+34%
Real World Speed
Performance profile from 13,682 user samples
Benchmark your SSD here
10,862 User Benchmarks
Best Bench: 114% 83GB free (System drive)
Worst Bench: 65% 20GB free (System drive)
Poor: 65% Great: 114%
SPEED RANK: 310th / 1074
2,820 User Benchmarks
Best Bench: 80% 50GB free
Worst Bench: 57% 13GB free (System drive)
Poor: 57% Great: 80%
SPEED RANK: 691st / 1074
Effective Speed
Effective SSD Speed 		91.7 % Much faster effective speed.
+34% 		68.6 %
Average Score 
+60%
Read
Avg. Sequential Read Speed 		455 MB/s Faster read speed.
+20% 		380 MB/s
Write
Avg. Sequential Write Speed 		406 MB/s Hugely faster write speed.
+178% 		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 		76.5 MB/s 81.6 MB/s Slightly faster random write.
+7%
Mixed
Avg. Sequential Mixed IO Speed 		258 MB/s Much faster mixed IO speed.
+36% 		190 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		33.4 MB/s 33.6 MB/s +1%
SusWrite
Avg. Sustained Write Speed 		350 MB/s Hugely faster sustained write speed.
+189% 		121 MB/s
Peak Score 
+69%
Read
Peak Sequential Read Speed 		509 MB/s Faster peak read speed.
+19% 		428 MB/s
Write
Peak Sequential Write Speed 		479 MB/s Hugely faster peak write speed.
+185% 		168 MB/s
4K Read
Peak 4K Random Read Speed 		35.6 MB/s Faster peak random read.
+11% 		32 MB/s
4K Write
Peak 4K Random Write Speed 		113 MB/s 116 MB/s +3%
Mixed
Peak Sequential Mixed IO Speed 		316 MB/s Much faster peak mixed IO speed.
+46% 		216 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		42.4 MB/s +3% 41.1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		480 MB/s Hugely faster peak sustained write speed.
+224% 		148 MB/s
Value & Sentiment 
+4%
Market Share
Based on 75,930,619 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.01 %
Value
Value For Money 		13.7 % Better value.
+28% 		10.7 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$79 $40 Much cheaper.
+49%
Nice To Haves 
+61%
Age
Newest 		119 Months More recent.
+18% 		146 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 		343 MB/s Hugely faster peak deep queue write.
+107% 		166 MB/s
AS-SSD Total
AS-SSD Total Score 		1,214 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 		325 MB/s Hugely faster deep queue read.
+103% 		160 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		267 MB/s Hugely faster deep queue write.
+87% 		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 		240GB 128GB
Conclusion 
Average Bench 91.7%
Average Bench 68.6%
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The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '14 SSDrivePro]

MORE DETAILS

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]

MORE DETAILS

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Solid State Drive Rankings (Price vs Performance) May 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 i5-12600K $171Nvidia RTX 4060 $293Crucial MX500 250GB $39
Intel Core i5-13600K $273Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i3-12100F $80Nvidia RTX 4070 $542Samsung 870 Evo 250GB $45
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $39SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $48SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $62G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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