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SamsungMZ-7PD256BW
MushkinMKNSSDCR240GB-DX
$181
▲ 5420,557 ▼

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC. Release date: Q4 2012.

VS
▲ 51716 ▼
 $181 

Controller: LSI Sandforce SF2281VB1-SDC. NAND: Toshiba 32Nm Toggle Mode. Release date: Q3 2011.

Effective Speed 
+27%
Real World Speed
Performance profile from 74,945 user samples
Benchmark your SSD here
73,119 User Benchmarks
Best Bench: 116% 238GB free
Worst Bench: 68% 11GB free (System drive)
Poor: 68% Great: 116%
SPEED RANK: 287th / 1080
1,826 User Benchmarks
Best Bench: 90% 26GB free
Worst Bench: 55% 89GB free (System drive)
Poor: 55% Great: 90%
SPEED RANK: 591st / 1080
Effective Speed
Effective SSD Speed 		95 % Faster effective speed.
+27% 		74.7 %
Average Score 
+30%
Read
Avg. Sequential Read Speed 		459 MB/s Faster read speed.
+25% 		368 MB/s
Write
Avg. Sequential Write Speed 		367 MB/s Much faster write speed.
+58% 		232 MB/s
4K Read
Avg. 4K Random Read Speed 		31 MB/s Slightly faster random read.
+9% 		28.4 MB/s
4K Write
Avg. 4K Random Write Speed 		85.6 MB/s Faster random write.
+10% 		77.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		303 MB/s Faster mixed IO speed.
+18% 		257 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		39.5 MB/s Faster random mixed IO.
+15% 		34.3 MB/s
SusWrite
Avg. Sustained Write Speed 		312 MB/s Much faster sustained write speed.
+76% 		177 MB/s
Peak Score 
+31%
Read
Peak Sequential Read Speed 		510 MB/s Faster peak read speed.
+19% 		430 MB/s
Write
Peak Sequential Write Speed 		480 MB/s Much faster peak write speed.
+62% 		297 MB/s
4K Read
Peak 4K Random Read Speed 		36.1 MB/s +4% 34.8 MB/s
4K Write
Peak 4K Random Write Speed 		114 MB/s +2% 112 MB/s
Mixed
Peak Sequential Mixed IO Speed 		368 MB/s Faster peak mixed IO speed.
+23% 		298 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		47.6 MB/s Slightly faster peak random mixed IO.
+7% 		44.6 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		477 MB/s Hugely faster peak sustained write speed.
+104% 		234 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,432,371 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.04 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		8.21 % Much better value.
+37% 		6 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$175 +3% $181
Nice To Haves 
+13%
Age
Newest 		145 Months Slightly more recent.
+8% 		158 Months
DQ Read
Peak 4K-64Thread Read Speed 		385 MB/s Faster peak deep queue read.
+28% 		300 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		334 MB/s Faster peak deep queue write.
+27% 		263 MB/s
AS-SSD Total
AS-SSD Total Score 		1,221 Pts Stronger server IO.
+24% 		982 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		176 MB/s 246 MB/s Much faster peak deep queue mixed IO.
+40%
ADQ Read
Avg. 4K-64Thread Read Speed 		346 MB/s Much faster deep queue read.
+44% 		241 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s Faster deep queue write.
+29% 		203 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		147 MB/s 169 MB/s Faster deep queue mixed IO.
+15%
Specifications 
Capacity
Capacity 		256GB 240GB
Conclusion 
Average Bench 95%
Average Bench 74.7%

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]

MORE DETAILS

The Mushkin Chronos and Chronos Deluxe are both Sandforce 2881 based SSDs from Mushkin. The only difference between the two is their NAND Flash: Intel asynchronous 25Nm for the Chronos vs Toshiba 32Nm Toggle Mode for the Deluxe. The 32Nm Toggle NAND supports far higher write speeds as can be seen from this direct performance comparison of the two drives. Overall the Chronos Deluxe performs slightly above expectations for a Sandforce SF2281 drive, it has reasonable read speeds but still struggles when faced with writing incompressible data. With an effective (real world) speed of 347 MB/s the Chronos Deluxe lags the group leaders by 50% and as such there are far better drives, such as the Samsung Evo, available in today's market. [Jan '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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