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SamsungMZ-75E250B
CrucialCT4000MX500SSD1
▲ 5640,704 ▼

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND. Release date: Q4 2014.

VS
▲ 518 ▼

Controller: Silicon Motion SM2258. Flash Memory: Micron 3D TLC. Release date ≈ Q4 2021.

Effective Speed 
+2%
Real World Speed
Performance profile from 955,225 user samples
Benchmark your SSD here
951,591 User Benchmarks
Best Bench: 124% 140GB free
Worst Bench: 72% 233GB free
Poor: 72% Great: 124%
SPEED RANK: 251st / 1080
3,634 User Benchmarks
Great bench: 119% 2.5TB free
Poor bench: 76% 3.5TB free
Poor: 76% Great: 119%
SPEED RANK: 261st / 1080
Effective Speed
Effective SSD Speed 		103 % +2% 101 %
Average Score 
+3%
Read
Avg. Sequential Read Speed 		466 MB/s Much faster read speed.
+34% 		349 MB/s
Write
Avg. Sequential Write Speed 		434 MB/s Slightly faster write speed.
+6% 		409 MB/s
4K Read
Avg. 4K Random Read Speed 		39.4 MB/s Faster random read.
+18% 		33.4 MB/s
4K Write
Avg. 4K Random Write Speed 		94.6 MB/s Faster random write.
+16% 		81.7 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		370 MB/s +5% 354 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		52.2 MB/s Faster random mixed IO.
+13% 		46.2 MB/s
SusWrite
Avg. Sustained Write Speed 		247 MB/s 414 MB/s Much faster sustained write speed.
+68%
Peak Score 
+7%
Read
Peak Sequential Read Speed 		507 MB/s Much faster peak read speed.
+33% 		382 MB/s
Write
Peak Sequential Write Speed 		492 MB/s Slightly faster peak write speed.
+5% 		467 MB/s
4K Read
Peak 4K Random Read Speed 		47.6 MB/s Faster peak random read.
+19% 		39.9 MB/s
4K Write
Peak 4K Random Write Speed 		129 MB/s Faster peak random write.
+10% 		117 MB/s
Mixed
Peak Sequential Mixed IO Speed 		416 MB/s Slightly faster peak mixed IO speed.
+8% 		384 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		64.6 MB/s Faster peak random mixed IO.
+12% 		57.8 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		328 MB/s 462 MB/s Much faster peak sustained write speed.
+41%
Value & Sentiment 
+791%
Market Share
Based on 77,605,212 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.7 % Insanely higher market share.
+3,400% 		0.02 %
Value
Value For Money 		13.4 % 54.1 % Hugely better value.
+304%
User Rating
UBM User Rating 		56 % Slightly more popular.
+10% 		51 %
Price
Price (score) 		$100 Much cheaper.
+58% 		$240
Nice To Haves 
+31%
Age
Newest 		119 Months 37+ Months Much more recent.
+69%
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s Slightly faster peak deep queue read.
+8% 		356 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s 364 MB/s +1%
AS-SSD Total
AS-SSD Total Score 		1,290 Pts Slightly stronger server IO.
+7% 		1,203 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Hugely faster peak deep queue mixed IO.
+153% 		146 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		354 MB/s Slightly faster deep queue read.
+9% 		324 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		308 MB/s +1% 305 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		320 MB/s Hugely faster deep queue mixed IO.
+137% 		135 MB/s
Specifications 
Capacity
Capacity 		250GB 4TB
Conclusion 
Average Bench 103%
Average Bench 101%

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders. [Dec '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?
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?
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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?
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The Best
CPUGPUSSD
Intel Core i5-13600K $210Nvidia RTX 4060 $285WD Black SN850X M.2 2TB $125
Intel Core i5-12600K $160Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $80
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $330
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