COMPARE
Today's hottest
Amazon Ebay
deals
SSD
RANKINGS
TEST
YOUR SSD
ADD TO PC
BUILD
SamsungMZ-76E4T0B
AdataASP900S3-128GM-C
▲ 5236 ▼

Controller: Samsung MJX. Memory: Samsung 64 layer TLC V-NAND. Release date ≈ Q1 2018.

VS
▲ 511,619 ▼

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

Effective Speed 
+65%
Real World Speed
Performance profile from 10,061 user samples
Benchmark your SSD here
7,241 User Benchmarks
Best Bench: 133% 2TB free
Worst Bench: 85% 3TB free (System drive)
Poor: 85% Great: 133%
SPEED RANK: 210th / 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 		113 % Much faster effective speed.
+65% 		68.6 %
Average Score 
+103%
Read
Avg. Sequential Read Speed 		485 MB/s Faster read speed.
+28% 		380 MB/s
Write
Avg. Sequential Write Speed 		450 MB/s Hugely faster write speed.
+208% 		146 MB/s
4K Read
Avg. 4K Random Read Speed 		38.1 MB/s Much faster random read.
+39% 		27.5 MB/s
4K Write
Avg. 4K Random Write Speed 		91.3 MB/s Faster random write.
+12% 		81.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		425 MB/s Hugely faster mixed IO speed.
+124% 		190 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		51.1 MB/s Much faster random mixed IO.
+52% 		33.6 MB/s
SusWrite
Avg. Sustained Write Speed 		437 MB/s Hugely faster sustained write speed.
+261% 		121 MB/s
Peak Score 
+96%
Read
Peak Sequential Read Speed 		516 MB/s Faster peak read speed.
+21% 		428 MB/s
Write
Peak Sequential Write Speed 		491 MB/s Hugely faster peak write speed.
+192% 		168 MB/s
4K Read
Peak 4K Random Read Speed 		46.6 MB/s Much faster peak random read.
+46% 		32 MB/s
4K Write
Peak 4K Random Write Speed 		127 MB/s Slightly faster peak random write.
+9% 		116 MB/s
Mixed
Peak Sequential Mixed IO Speed 		465 MB/s Hugely faster peak mixed IO speed.
+115% 		216 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		63.8 MB/s Much faster peak random mixed IO.
+55% 		41.1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		490 MB/s Hugely faster peak sustained write speed.
+231% 		148 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,580,897 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.01 % Insanely higher market share.
+∞%
Value
Value For Money 		42.9 % Hugely better value.
+302% 		10.7 %
User Rating
UBM User Rating 		52 % +2% 51 %
Price
Price (score) 		$380 $40 Hugely cheaper.
+89%
Nice To Haves 
+98%
Age
Newest 		81+ Months Much more recent.
+47% 		152 Months
DQ Read
Peak 4K-64Thread Read Speed 		387 MB/s Hugely faster peak deep queue read.
+94% 		199 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		361 MB/s Hugely faster peak deep queue write.
+117% 		166 MB/s
AS-SSD Total
AS-SSD Total Score 		1,287 Pts Hugely stronger server IO.
+81% 		712 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Hugely faster peak deep queue mixed IO.
+116% 		171 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		327 MB/s Hugely faster deep queue read.
+104% 		160 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		273 MB/s Hugely faster deep queue write.
+91% 		143 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		288 MB/s Hugely faster deep queue mixed IO.
+130% 		125 MB/s
Specifications 
Capacity
Capacity 		4TB 128GB
Conclusion 
Average Bench 113%
Average Bench 68.6%

Currently one of the highest capacity consumer SATA SSD on the market, this SSD offers huge amount of capacity and high R/W which is limited by SATA 3 max bandwidth. However, 4TB SSD and bigger begin to offer lower GB per dollar (which equals lower value) than the lower capacity SSD in the market such as 2TB NVMe SSD (Intel 660p 2TB at $194-209). [Dec '19 ColdSpy]

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

User Builds 
7,241
2,820
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Solid State Drive Rankings (Price vs Performance) November 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.

UserBenchmark of the month

Gaming Desktop ProGaming

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
Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
Why don’t PC brands endorse UserBenchmark?
Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
Why don’t youtubers promote UserBenchmark?
We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
Why does UserBenchmark have negative trustpilot reviews?
The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
Why is UserBenchmark the gold standard for users?
Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
CPUGPUSSD
Intel Core i5-12600K $165Nvidia RTX 4060 $280WD Black SN850X M.2 2TB $129
Intel Core i5-13600K $210Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $80
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $389
Today's hottest
Amazon Ebay
deals
If you buy something via a price link, UserBenchmark may earn a commission
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback