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SamsungMZ-75E250B
SamsungMZ-7KE256BW
▲ 5640,704 ▼

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

VS
▲ 5441,223 ▼

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

Effective Speed 
+2%
Real World Speed
Performance profile from 1,093,520 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
141,929 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 71% 71GB free (System drive)
Poor: 71% Great: 124%
SPEED RANK: 256th / 1080
Effective Speed
Effective SSD Speed 		103 % +2% 102 %
Average Score 
+3%
Read
Avg. Sequential Read Speed 		466 MB/s 469 MB/s +1%
Write
Avg. Sequential Write Speed 		434 MB/s Slightly faster write speed.
+10% 		396 MB/s
4K Read
Avg. 4K Random Read Speed 		39.4 MB/s Faster random read.
+16% 		33.9 MB/s
4K Write
Avg. 4K Random Write Speed 		94.6 MB/s Slightly faster random write.
+6% 		89.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		370 MB/s Faster mixed IO speed.
+11% 		334 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		52.2 MB/s Faster random mixed IO.
+18% 		44.1 MB/s
SusWrite
Avg. Sustained Write Speed 		247 MB/s 346 MB/s Much faster sustained write speed.
+40%
Peak Score 
+2%
Read
Peak Sequential Read Speed 		507 MB/s 515 MB/s +2%
Write
Peak Sequential Write Speed 		492 MB/s +1% 488 MB/s
4K Read
Peak 4K Random Read Speed 		47.6 MB/s Slightly faster peak random read.
+9% 		43.6 MB/s
4K Write
Peak 4K Random Write Speed 		129 MB/s +3% 125 MB/s
Mixed
Peak Sequential Mixed IO Speed 		416 MB/s Slightly faster peak mixed IO speed.
+9% 		383 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		64.6 MB/s Faster peak random mixed IO.
+14% 		56.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		328 MB/s 484 MB/s Much faster peak sustained write speed.
+48%
Value & Sentiment 
+200%
Market Share
Based on 77,603,902 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.7 % Hugely higher market share.
+775% 		0.08 %
Value
Value For Money 		13.4 % Slightly better value.
+9% 		12.3 %
User Rating
UBM User Rating 		56 % +4% 54 %
Price
Price (score) 		$100 Cheaper.
+11% 		$112
Nice To Haves 
+4%
Age
Newest 		119 Months +4% 124 Months
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s 388 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s +0% 361 MB/s
AS-SSD Total
AS-SSD Total Score 		1,290 Pts +1% 1,280 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s +4% 356 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		354 MB/s +3% 344 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		308 MB/s Slightly faster deep queue write.
+9% 		282 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		320 MB/s Slightly faster deep queue mixed IO.
+8% 		295 MB/s
Specifications 
Capacity
Capacity 		250GB 256GB
Conclusion 
Average Bench 103%
Average Bench 102%

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 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

MORE DETAILS

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Solid State Drive Rankings (Price vs Performance) November 2024 SSD Rankings

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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  • Best user rated - User sentiment trumps benchmarks for this comparison.
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Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.

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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?
What is incompressible data?
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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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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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The Best
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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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