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AdataASP550SS3-960GM-C
SamsungMZ-77E250B
▲ 5166 ▼

Controller: Silicon Motion SM2256. Flash Memory: SK Hynix 16nm TLC. Release date: Q3 2015.

VS
▲ 57214 ▼

Controller: Samsung MKX. Memory: Samsung 128 layer TLC V-NAND. Release date: Q1 2021.

Effective Speed 
+24%
Real World Speed
Performance profile from 15,104 user samples
Benchmark your SSD here
1,022 User Benchmarks
Best Bench: 95% 893GB free
Worst Bench: 59% 480GB free (System drive)
Poor: 59% Great: 95%
SPEED RANK: 465th / 1072
14,082 User Benchmarks
Best Bench: 128% 0GB free
Worst Bench: 67% 59GB free (System drive)
Poor: 67% Great: 128%
SPEED RANK: 251st / 1072
Effective Speed
Effective SSD Speed 		81.6 % 101 % Faster effective speed.
+24%
Average Score 
+22%
Read
Avg. Sequential Read Speed 		416 MB/s 461 MB/s Faster read speed.
+11%
Write
Avg. Sequential Write Speed 		386 MB/s 395 MB/s +2%
4K Read
Avg. 4K Random Read Speed 		24.4 MB/s 36.4 MB/s Much faster random read.
+49%
4K Write
Avg. 4K Random Write Speed 		82.2 MB/s +0% 81.9 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		304 MB/s 365 MB/s Faster mixed IO speed.
+20%
4K Mixed
Avg. 4K Random Mixed IO Speed 		36.4 MB/s 45.9 MB/s Faster random mixed IO.
+26%
SusWrite
Avg. Sustained Write Speed 		220 MB/s 322 MB/s Much faster sustained write speed.
+46%
Peak Score 
+35%
Read
Peak Sequential Read Speed 		454 MB/s 514 MB/s Faster peak read speed.
+13%
Write
Peak Sequential Write Speed 		456 MB/s 486 MB/s Slightly faster peak write speed.
+7%
4K Read
Peak 4K Random Read Speed 		28.9 MB/s 49.1 MB/s Much faster peak random read.
+70%
4K Write
Peak 4K Random Write Speed 		117 MB/s 123 MB/s Slightly faster peak random write.
+5%
Mixed
Peak Sequential Mixed IO Speed 		339 MB/s 457 MB/s Much faster peak mixed IO speed.
+35%
4K Mixed
Peak 4K Random Mixed IO Speed 		44.9 MB/s 66.1 MB/s Much faster peak random mixed IO.
+47%
SusWrite
Peak Sequential Sustained Write 60s Average 		231 MB/s 396 MB/s Much faster peak sustained write speed.
+71%
Value & Sentiment 
+∞%
Market Share
Based on 75,648,446 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.13 % Insanely higher market share.
+∞%
Value
Value For Money 		27.1 % 31.6 % Better value.
+17%
User Rating
UBM User Rating 		51 % 57 % More popular.
+12%
Price
Price (score) 		$109 $31 Much cheaper.
+72%
Nice To Haves 
+30%
Age
Newest 		103 Months 38 Months Much more recent.
+63%
DQ Read
Peak 4K-64Thread Read Speed 		324 MB/s 389 MB/s Faster peak deep queue read.
+20%
DQ Write
Peak 4K-64Thread Write Speed 		330 MB/s 362 MB/s Slightly faster peak deep queue write.
+10%
AS-SSD Total
AS-SSD Total Score 		1,105 Pts 1291 Pts Stronger server IO.
+17%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		239 MB/s 372 MB/s Much faster peak deep queue mixed IO.
+56%
ADQ Read
Avg. 4K-64Thread Read Speed 		275 MB/s 349 MB/s Faster deep queue read.
+27%
ADQ Write
Avg. 4K-64Thread Write Speed 		274 MB/s 299 MB/s Slightly faster deep queue write.
+9%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		206 MB/s 280 MB/s Much faster deep queue mixed IO.
+36%
Specifications 
Capacity
Capacity 		960GB 250GB
User Builds 
1,022
14,082
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

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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.

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
The Best.
CPUGPUSSD
Intel Core i5-13600K $275Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia 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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