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CrucialCT128MX100SSD1
$74
CrucialCT256M550SSD1
$152
▲ 521,170 ▼
 $74 

Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC. Release date: Q2 2014.

VS
▲ 527,484 ▼
 $152 

Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC. Release date: Q1 2014.

Effective Speed 
+19%
Real World Speed
Performance profile from 18,225 user samples
Benchmark your SSD here
9,892 User Benchmarks
Best Bench: 89% 42GB free
Worst Bench: 56% 119GB free
Poor: 56% Great: 89%
SPEED RANK: 558th / 1072
8,333 User Benchmarks
Best Bench: 113% 106GB free
Worst Bench: 60% 231GB free
Poor: 60% Great: 113%
SPEED RANK: 320th / 1072
Effective Speed
Effective SSD Speed 		75.9 % 90.5 % Faster effective speed.
+19%
Average Score 
+43%
Read
Avg. Sequential Read Speed 		431 MB/s +3% 418 MB/s
Write
Avg. Sequential Write Speed 		179 MB/s 416 MB/s Hugely faster write speed.
+132%
4K Read
Avg. 4K Random Read Speed 		26.6 MB/s 27.1 MB/s +2%
4K Write
Avg. 4K Random Write Speed 		87.1 MB/s +2% 85 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		217 MB/s 299 MB/s Much faster mixed IO speed.
+38%
4K Mixed
Avg. 4K Random Mixed IO Speed 		35 MB/s 37.9 MB/s Slightly faster random mixed IO.
+8%
SusWrite
Avg. Sustained Write Speed 		139 MB/s 311 MB/s Hugely faster sustained write speed.
+124%
Peak Score 
+51%
Read
Peak Sequential Read Speed 		473 MB/s +2% 466 MB/s
Write
Peak Sequential Write Speed 		187 MB/s 470 MB/s Hugely faster peak write speed.
+151%
4K Read
Peak 4K Random Read Speed 		30.5 MB/s 31.9 MB/s +5%
4K Write
Peak 4K Random Write Speed 		121 MB/s +3% 118 MB/s
Mixed
Peak Sequential Mixed IO Speed 		233 MB/s 333 MB/s Much faster peak mixed IO speed.
+43%
4K Mixed
Peak 4K Random Mixed IO Speed 		41.7 MB/s 46.4 MB/s Faster peak random mixed IO.
+11%
SusWrite
Peak Sequential Sustained Write 60s Average 		184 MB/s 459 MB/s Hugely faster peak sustained write speed.
+149%
Value & Sentiment 
�%
Market Share
Based on 75,635,523 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0 %
Value
Value For Money 		7.44 % 8.68 % Better value.
+17%
User Rating
UBM User Rating 		52 % 52 %
Price
Price (score) 		$74 Much cheaper.
+51% 		$152
Nice To Haves 
+39%
Age
Newest 		118 Months +2% 120 Months
DQ Read
Peak 4K-64Thread Read Speed 		316 MB/s 387 MB/s Faster peak deep queue read.
+22%
DQ Write
Peak 4K-64Thread Write Speed 		186 MB/s 361 MB/s Hugely faster peak deep queue write.
+94%
AS-SSD Total
AS-SSD Total Score 		917 Pts 1,240 Pts Much stronger server IO.
+35%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		170 MB/s 240 MB/s Much faster peak deep queue mixed IO.
+41%
ADQ Read
Avg. 4K-64Thread Read Speed 		286 MB/s 311 MB/s Slightly faster deep queue read.
+9%
ADQ Write
Avg. 4K-64Thread Write Speed 		159 MB/s 282 MB/s Much faster deep queue write.
+77%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		151 MB/s 201 MB/s Much faster deep queue mixed IO.
+33%
Specifications 
Capacity
Capacity 		128GB 256GB
Conclusion 
Average Bench 75.9%
Average Bench 90.5%
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The Crucial 128GB MX100 has the smallest capacity and is the slowest of the MX100 range. Comparing the 128GB and 256GB MX100s shows that the 256GB version has a 75% faster write speed. Within the MX100 range write speeds scale linearly with capacity, as a consequence, the 128GB version struggles to compete with similarly priced drives from other manufacturers. On the other hand, the 512GB version and to a lesser extent the 256GB version offer far better value for money. Overall the MX100 has an effective speed which is amongst the top 30% of 128GB drives so its not bad by any means but there are however both cheaper and faster alternatives available in the now extremely competitive 128GB SSD category. [Oct '14 SSDrivePro]

MORE DETAILS

The 256GB Crucial M550 is a welcome improvement over the 240GB M500. The new Marvel 88SS9189 controller has addressed our primary concern with the M500 which was poor sequential write speed. With sequential read/write speeds of 510/478 MB/s the M550 has a healthy core performance profile. Comparing the M550 and M500 shows that the new M550 leads on nearly every single performance metric. Unfortunately the M550 is priced significantly higher than the M500 but prices will likely drop as retailers build up stocks of the new M550. A key comparable for the M550 is the similarly priced market leading Samsung Evo. Comparing the Evo and M550 shows that the Evo is around 11% slower in terms of effective speed. [Mar '14 SSDrivePro]

MORE DETAILS

User Builds 
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8,333
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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.

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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 i5-13600K $273Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $186Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $34Corsair 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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