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KingstonSKC300S37A/240G
CrucialCT128MX100SSD1
$74
▲ 504 ▼

Controller: SandForce SF2281. Flash Memory: Toshiba 19nm Toggle Mode. Release date ≤ Q2 2014.

VS
▲ 521,170 ▼
 $74 

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

Effective Speed 
+3%
Real World Speed
Performance profile from 11,946 user samples
Benchmark your SSD here
2,054 User Benchmarks
Best Bench: 94% 205GB free
Worst Bench: 56% 174GB free (System drive)
Poor: 56% Great: 94%
SPEED RANK: 523rd / 1080
9,892 User Benchmarks
Best Bench: 89% 42GB free
Worst Bench: 56% 119GB free
Poor: 56% Great: 89%
SPEED RANK: 566th / 1080
Effective Speed
Effective SSD Speed 		78.3 % +3% 75.9 %
Average Score 
+12%
Read
Avg. Sequential Read Speed 		371 MB/s 431 MB/s Faster read speed.
+16%
Write
Avg. Sequential Write Speed 		244 MB/s Much faster write speed.
+36% 		179 MB/s
4K Read
Avg. 4K Random Read Speed 		30.1 MB/s Faster random read.
+13% 		26.6 MB/s
4K Write
Avg. 4K Random Write Speed 		76.8 MB/s 87.1 MB/s Faster random write.
+13%
Mixed
Avg. Sequential Mixed IO Speed 		272 MB/s Faster mixed IO speed.
+25% 		217 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		38.3 MB/s Slightly faster random mixed IO.
+9% 		35 MB/s
SusWrite
Avg. Sustained Write Speed 		179 MB/s Faster sustained write speed.
+29% 		139 MB/s
Peak Score 
+19%
Read
Peak Sequential Read Speed 		448 MB/s 473 MB/s Slightly faster peak read speed.
+6%
Write
Peak Sequential Write Speed 		273 MB/s Much faster peak write speed.
+46% 		187 MB/s
4K Read
Peak 4K Random Read Speed 		37.7 MB/s Faster peak random read.
+24% 		30.5 MB/s
4K Write
Peak 4K Random Write Speed 		113 MB/s 121 MB/s Slightly faster peak random write.
+7%
Mixed
Peak Sequential Mixed IO Speed 		309 MB/s Much faster peak mixed IO speed.
+33% 		233 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		48.8 MB/s Faster peak random mixed IO.
+17% 		41.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		227 MB/s Faster peak sustained write speed.
+23% 		184 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 76,253,897 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.01 % Insanely higher market share.
+∞%
Value
Value For Money 		14.8 % Hugely better value.
+99% 		7.44 %
User Rating
UBM User Rating 		50 % 52 % +4%
Price
Price (score) 		$58 Cheaper.
+22% 		$74
Nice To Haves 
+22%
Age
Newest 		122+ Months 120 Months +2%
DQ Read
Peak 4K-64Thread Read Speed 		295 MB/s 316 MB/s Slightly faster peak deep queue read.
+7%
DQ Write
Peak 4K-64Thread Write Speed 		256 MB/s Much faster peak deep queue write.
+38% 		186 MB/s
AS-SSD Total
AS-SSD Total Score 		973 Pts Slightly stronger server IO.
+6% 		917 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		293 MB/s Much faster peak deep queue mixed IO.
+72% 		170 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		267 MB/s 286 MB/s Slightly faster deep queue read.
+7%
ADQ Write
Avg. 4K-64Thread Write Speed 		215 MB/s Much faster deep queue write.
+35% 		159 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		213 MB/s Much faster deep queue mixed IO.
+41% 		151 MB/s
Specifications 
Capacity
Capacity 		240GB 128GB
Conclusion 
Average Bench 78.3%
Average Bench 75.9%
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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]

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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]

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 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
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What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
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Solid State Drives
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What is 4K 64 thread write speed?
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