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CrucialCT512M550SSD1
CrucialCT512M4SSD2
▲ 506 ▼

Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC. Release date ≤ Q2 2014.

VS
▲ 501 ▼

Controller: Marvell 88SS9174-BLD2. Flash Memory: Micron Synchronous 25nm MLC. Release date ≤ Q4 2013.

Effective Speed 
+38%
Real World Speed
Performance profile from 10,283 user samples
Benchmark your SSD here
5,683 User Benchmarks
Best Bench: 111% 167GB free
Worst Bench: 65% 6GB free (System drive)
Poor: 65% Great: 111%
SPEED RANK: 310th / 1080
4,600 User Benchmarks
Best Bench: 81% 377GB free
Worst Bench: 48% 120GB free (System drive)
Poor: 48% Great: 81%
SPEED RANK: 726th / 1080
Effective Speed
Effective SSD Speed 		92.5 % Much faster effective speed.
+38% 		66.9 %
Average Score 
+35%
Read
Avg. Sequential Read Speed 		421 MB/s 451 MB/s Slightly faster read speed.
+7%
Write
Avg. Sequential Write Speed 		422 MB/s Much faster write speed.
+70% 		248 MB/s
4K Read
Avg. 4K Random Read Speed 		26.3 MB/s Much faster random read.
+32% 		19.9 MB/s
4K Write
Avg. 4K Random Write Speed 		86.6 MB/s Faster random write.
+18% 		73.5 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		295 MB/s Slightly faster mixed IO speed.
+8% 		273 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		36.9 MB/s Much faster random mixed IO.
+58% 		23.3 MB/s
SusWrite
Avg. Sustained Write Speed 		343 MB/s Much faster sustained write speed.
+67% 		205 MB/s
Peak Score 
+35%
Read
Peak Sequential Read Speed 		464 MB/s 501 MB/s Slightly faster peak read speed.
+8%
Write
Peak Sequential Write Speed 		470 MB/s Much faster peak write speed.
+68% 		279 MB/s
4K Read
Peak 4K Random Read Speed 		30.3 MB/s Faster peak random read.
+29% 		23.5 MB/s
4K Write
Peak 4K Random Write Speed 		120 MB/s Faster peak random write.
+15% 		104 MB/s
Mixed
Peak Sequential Mixed IO Speed 		322 MB/s Slightly faster peak mixed IO speed.
+7% 		300 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		44.4 MB/s Much faster peak random mixed IO.
+60% 		27.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		463 MB/s Much faster peak sustained write speed.
+75% 		265 MB/s
Value & Sentiment 
�%
Market Share
Based on 77,538,382 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0 %
Value
Value For Money 		9.36 % 18.5 % Hugely better value.
+98%
User Rating
UBM User Rating 		50 % 50 %
Price
Price (score) 		$283 $74 Much cheaper.
+74%
Nice To Haves 
+134%
Age
Newest 		127+ Months +3% 131+ Months
DQ Read
Peak 4K-64Thread Read Speed 		384 MB/s Hugely faster peak deep queue read.
+96% 		196 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s Much faster peak deep queue write.
+53% 		236 MB/s
AS-SSD Total
AS-SSD Total Score 		1,236 Pts Much stronger server IO.
+60% 		773 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		232 MB/s Hugely faster peak deep queue mixed IO.
+321% 		55.1 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		320 MB/s Hugely faster deep queue read.
+124% 		143 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		295 MB/s Hugely faster deep queue write.
+102% 		146 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		203 MB/s Hugely faster deep queue mixed IO.
+312% 		49.3 MB/s
Specifications 
Capacity
Capacity 		512GB 512GB
User Builds 
5,683
4,600
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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.

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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 »

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Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
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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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The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
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Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
CPUGPUSSD
Intel Core i5-12600K $159Nvidia RTX 4060 $280WD Black SN850X M.2 2TB $135
Intel Core i5-13600K $210Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $75
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $370
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