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SamsungMZ-75E250B
SamsungMZ-7TE250BW
▲ 5640,704 ▼

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

VS
▲ 5335,450 ▼

Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC. Release date: Q3 2013.

Effective Speed 
+8%
Real World Speed
Performance profile from 1,168,706 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
217,115 User Benchmarks
Best Bench: 118% 68GB free
Worst Bench: 64% 231GB free
Poor: 64% Great: 118%
SPEED RANK: 284th / 1080
Effective Speed
Effective SSD Speed 		103 % Slightly faster effective speed.
+8% 		95.9 %
Average Score 
+9%
Read
Avg. Sequential Read Speed 		466 MB/s +0% 465 MB/s
Write
Avg. Sequential Write Speed 		434 MB/s Faster write speed.
+10% 		394 MB/s
4K Read
Avg. 4K Random Read Speed 		39.4 MB/s +2% 38.8 MB/s
4K Write
Avg. 4K Random Write Speed 		94.6 MB/s Faster random write.
+11% 		85.3 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		370 MB/s Slightly faster mixed IO speed.
+7% 		347 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		52.2 MB/s Slightly faster random mixed IO.
+9% 		48 MB/s
SusWrite
Avg. Sustained Write Speed 		247 MB/s Faster sustained write speed.
+27% 		195 MB/s
Peak Score 
+4%
Read
Peak Sequential Read Speed 		507 MB/s 507 MB/s
Write
Peak Sequential Write Speed 		492 MB/s +1% 489 MB/s
4K Read
Peak 4K Random Read Speed 		47.6 MB/s +2% 46.7 MB/s
4K Write
Peak 4K Random Write Speed 		129 MB/s Slightly faster peak random write.
+8% 		119 MB/s
Mixed
Peak Sequential Mixed IO Speed 		416 MB/s 418 MB/s +0%
4K Mixed
Peak 4K Random Mixed IO Speed 		64.6 MB/s Slightly faster peak random mixed IO.
+8% 		59.8 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		328 MB/s Slightly faster peak sustained write speed.
+10% 		299 MB/s
Value & Sentiment 
+78%
Market Share
Based on 77,602,743 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.68 % Hugely higher market share.
+300% 		0.17 %
Value
Value For Money 		13.4 % Slightly better value.
+7% 		12.5 %
User Rating
UBM User Rating 		56 % Slightly more popular.
+6% 		53 %
Price
Price (score) 		$100 $99 +1%
Nice To Haves 
+17%
Age
Newest 		119 Months More recent.
+12% 		136 Months
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s +1% 383 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s 362 MB/s
AS-SSD Total
AS-SSD Total Score 		1,290 Pts +1% 1,273 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Much faster peak deep queue mixed IO.
+56% 		237 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		354 MB/s Slightly faster deep queue read.
+5% 		337 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		308 MB/s Slightly faster deep queue write.
+5% 		293 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		320 MB/s Much faster deep queue mixed IO.
+58% 		203 MB/s
Specifications 
Capacity
Capacity 		250GB 250GB
Conclusion 
Average Bench 103%
Average Bench 95.9%

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]

MORE DETAILS

The Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this consists of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 SSDrivePro]

MORE DETAILS

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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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Solid State Drives
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