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SamsungMZ-75E250B
AdataAS511S3-240GM-C
▲ 5640,704 ▼

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

VS
▲ 501 ▼

Release date ≤ Q4 2013.

Effective Speed 
+40%
Real World Speed
Performance profile from 951,650 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
59 User Benchmarks
Best Bench: 86% 201GB free
Worst Bench: 59% 41GB free (System drive)
Poor: 59% Great: 86%
SPEED RANK: 607th / 1080
Effective Speed
Effective SSD Speed 		103 % Much faster effective speed.
+40% 		73.7 %
Average Score 
+46%
Read
Avg. Sequential Read Speed 		466 MB/s Slightly faster read speed.
+7% 		436 MB/s
Write
Avg. Sequential Write Speed 		434 MB/s Hugely faster write speed.
+83% 		237 MB/s
4K Read
Avg. 4K Random Read Speed 		39.4 MB/s Much faster random read.
+43% 		27.5 MB/s
4K Write
Avg. 4K Random Write Speed 		94.6 MB/s Faster random write.
+22% 		77.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		370 MB/s Much faster mixed IO speed.
+30% 		284 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		52.2 MB/s Hugely faster random mixed IO.
+111% 		24.7 MB/s
SusWrite
Avg. Sustained Write Speed 		247 MB/s Faster sustained write speed.
+28% 		193 MB/s
Peak Score 
+38%
Read
Peak Sequential Read Speed 		507 MB/s 520 MB/s +3%
Write
Peak Sequential Write Speed 		492 MB/s Much faster peak write speed.
+76% 		279 MB/s
4K Read
Peak 4K Random Read Speed 		47.6 MB/s Much faster peak random read.
+40% 		34 MB/s
4K Write
Peak 4K Random Write Speed 		129 MB/s Faster peak random write.
+12% 		115 MB/s
Mixed
Peak Sequential Mixed IO Speed 		416 MB/s Faster peak mixed IO speed.
+28% 		324 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		64.6 MB/s Much faster peak random mixed IO.
+59% 		40.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		328 MB/s Much faster peak sustained write speed.
+50% 		219 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,606,585 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.7 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		13.4 % Hugely better value.
+226% 		4.1 %
User Rating
UBM User Rating 		56 % More popular.
+12% 		50 %
Price
Price (score) 		$100 Much cheaper.
+66% 		$296
Nice To Haves 
+56%
Age
Newest 		119 Months Slightly more recent.
+8% 		130+ Months
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s Faster peak deep queue read.
+26% 		306 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s Much faster peak deep queue write.
+41% 		256 MB/s
AS-SSD Total
AS-SSD Total Score 		1,290 Pts Much stronger server IO.
+30% 		992 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Much faster peak deep queue mixed IO.
+51% 		245 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		354 MB/s Much faster deep queue read.
+65% 		214 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		308 MB/s Much faster deep queue write.
+60% 		193 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		320 MB/s Hugely faster deep queue mixed IO.
+164% 		121 MB/s
Specifications 
Capacity
Capacity 		250GB 240GB
Conclusion 
Average Bench 103%
Average Bench 73.7%

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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