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SamsungMZ-7KE256BW
MushkinMKNSSDRE1TB
▲ 5441,223 ▼

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

VS
▲ 51429 ▼

Controller: Silicon Motion SM2246EN. NAND: Micron 16nm MLC. Release date: Q1 2015.

Effective Speed 
+15%
Real World Speed
Performance profile from 151,494 user samples
Benchmark your SSD here
141,929 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 71% 71GB free (System drive)
Poor: 71% Great: 124%
SPEED RANK: 256th / 1080
9,565 User Benchmarks
Best Bench: 105% 879GB free
Worst Bench: 67% 97GB free (System drive)
Poor: 67% Great: 105%
SPEED RANK: 362nd / 1080
Effective Speed
Effective SSD Speed 		102 % Faster effective speed.
+15% 		88.5 %
Average Score 
+14%
Read
Avg. Sequential Read Speed 		469 MB/s 471 MB/s +0%
Write
Avg. Sequential Write Speed 		396 MB/s 397 MB/s +0%
4K Read
Avg. 4K Random Read Speed 		33.9 MB/s Much faster random read.
+48% 		22.9 MB/s
4K Write
Avg. 4K Random Write Speed 		89.6 MB/s Faster random write.
+14% 		78.8 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		334 MB/s Faster mixed IO speed.
+12% 		298 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		44.1 MB/s Much faster random mixed IO.
+33% 		33.2 MB/s
SusWrite
Avg. Sustained Write Speed 		346 MB/s 363 MB/s +5%
Peak Score 
+20%
Read
Peak Sequential Read Speed 		515 MB/s +1% 511 MB/s
Write
Peak Sequential Write Speed 		488 MB/s Faster peak write speed.
+13% 		433 MB/s
4K Read
Peak 4K Random Read Speed 		43.6 MB/s Much faster peak random read.
+50% 		29 MB/s
4K Write
Peak 4K Random Write Speed 		125 MB/s Faster peak random write.
+13% 		111 MB/s
Mixed
Peak Sequential Mixed IO Speed 		383 MB/s Faster peak mixed IO speed.
+17% 		328 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		56.7 MB/s Much faster peak random mixed IO.
+32% 		42.9 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		484 MB/s Faster peak sustained write speed.
+12% 		433 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,612,491 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.08 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		12.5 % 54.4 % Hugely better value.
+336%
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$110 $50 Much cheaper.
+55%
Nice To Haves 
+33%
Age
Newest 		124 Months 117 Months Slightly more recent.
+6%
DQ Read
Peak 4K-64Thread Read Speed 		388 MB/s Much faster peak deep queue read.
+39% 		279 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		361 MB/s Faster peak deep queue write.
+19% 		304 MB/s
AS-SSD Total
AS-SSD Total Score 		1,280 Pts Stronger server IO.
+27% 		1,008 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		356 MB/s Much faster peak deep queue mixed IO.
+66% 		214 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		344 MB/s Much faster deep queue read.
+42% 		242 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		282 MB/s Faster deep queue write.
+15% 		246 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		295 MB/s Much faster deep queue mixed IO.
+62% 		182 MB/s
Specifications 
Capacity
Capacity 		256GB 1TB
Conclusion 
Average Bench 102%
Average Bench 88.5%

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

The Mushkin Reactor features the same Silicon Motion SM2246EN controller found on both the Crucial BX100 and the Transcend SSD370. All three drives also feature Micron MLC NAND and consequently they all share a similar (and strong) performance profile. These drives were the last batch (early 2015) of budget drives to utilize MLC rather than TLC NAND and as a result they all have reasonably strong sustained write speeds. The more recent trend for budget drives is to utilize a small SLC write cache coupled with TLC NAND, a combination which results in severe write speed degradation upon cache exhaustion. The Mushkin Reactor doesn’t have this problem and both the 500GB and 1TB Reactors only lag the market leading 850 Evo slightly on performance. At today’s prices the 1TB Reactor offers better value for money than the market leading Samsung 850 Evo (compare them). See the current market leaders here. [May '16 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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The Best
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