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SamsungMZ-76P4T0B
SamsungMZ-75E250B
▲ 503 ▼

Controller: Samsung MJX. Memory: Samsung 64 layer MLC V-NAND. Release date ≈ Q3 2018.

VS
▲ 5640,704 ▼

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

Effective Speed 
+7%
Real World Speed
Performance profile from 952,314 user samples
Benchmark your SSD here
723 User Benchmarks
Best Bench: 131% 4TB free
Worst Bench: 84% 3.5TB free
Poor: 84% Great: 131%
SPEED RANK: 219th / 1080
951,591 User Benchmarks
Best Bench: 124% 140GB free
Worst Bench: 72% 233GB free
Poor: 72% Great: 124%
SPEED RANK: 251st / 1080
Effective Speed
Effective SSD Speed 		111 % Slightly faster effective speed.
+7% 		103 %
Average Score 
+11%
Read
Avg. Sequential Read Speed 		480 MB/s +3% 466 MB/s
Write
Avg. Sequential Write Speed 		442 MB/s +2% 434 MB/s
4K Read
Avg. 4K Random Read Speed 		37.9 MB/s 39.4 MB/s +4%
4K Write
Avg. 4K Random Write Speed 		88.2 MB/s 94.6 MB/s Slightly faster random write.
+7%
Mixed
Avg. Sequential Mixed IO Speed 		421 MB/s Faster mixed IO speed.
+14% 		370 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		49.6 MB/s 52.2 MB/s Slightly faster random mixed IO.
+5%
SusWrite
Avg. Sustained Write Speed 		431 MB/s Much faster sustained write speed.
+74% 		247 MB/s
Peak Score 
+7%
Read
Peak Sequential Read Speed 		514 MB/s +1% 507 MB/s
Write
Peak Sequential Write Speed 		487 MB/s 492 MB/s +1%
4K Read
Peak 4K Random Read Speed 		44.7 MB/s 47.6 MB/s Slightly faster peak random read.
+6%
4K Write
Peak 4K Random Write Speed 		128 MB/s 129 MB/s +1%
Mixed
Peak Sequential Mixed IO Speed 		456 MB/s Slightly faster peak mixed IO speed.
+10% 		416 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		62.1 MB/s 64.6 MB/s +4%
SusWrite
Peak Sequential Sustained Write 60s Average 		488 MB/s Much faster peak sustained write speed.
+49% 		328 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,612,121 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.74 % Insanely higher market share.
+∞%
Value
Value For Money 		23.6 % Much better value.
+76% 		13.4 %
User Rating
UBM User Rating 		50 % 56 % More popular.
+12%
Price
Price (score) 		$846 $100 Hugely cheaper.
+88%
Nice To Haves 
+0%
Age
Newest 		75+ Months Much more recent.
+37% 		119 Months
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s 386 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		350 MB/s 362 MB/s +3%
AS-SSD Total
AS-SSD Total Score 		1,271 Pts 1,290 Pts +1%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		360 MB/s 370 MB/s +3%
ADQ Read
Avg. 4K-64Thread Read Speed 		327 MB/s 354 MB/s Slightly faster deep queue read.
+8%
ADQ Write
Avg. 4K-64Thread Write Speed 		278 MB/s 308 MB/s Faster deep queue write.
+11%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		292 MB/s 320 MB/s Slightly faster deep queue mixed IO.
+10%
Specifications 
Capacity
Capacity 		4TB 250GB
Conclusion 
Average Bench 111%
Average Bench 103%

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?
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What’s the difference between SATA, PCIe and NVMe?
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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?
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The Best
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