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SamsungMZ-7PD256BW
PatriotPP120GS25SSDR
▲ 5420,557 ▼

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

VS
▲ 51346 ▼

Controller: SandForce SF2281. NAND Memory: IMFT Asynchronous 25nm MLC. Release date: Q3 2011.

Effective Speed 
+51%
Real World Speed
Performance profile from 73,277 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
158 User Benchmarks
Great Bench: 76% 112GB free
Poor Bench: 48% 13GB free (System drive)
Poor: 48% Great: 76%
SPEED RANK: 778th / 1080
Effective Speed
Effective SSD Speed 		95 % Much faster effective speed.
+51% 		63 %
Average Score 
+77%
Read
Avg. Sequential Read Speed 		459 MB/s Much faster read speed.
+32% 		348 MB/s
Write
Avg. Sequential Write Speed 		367 MB/s Hugely faster write speed.
+174% 		134 MB/s
4K Read
Avg. 4K Random Read Speed 		31 MB/s Faster random read.
+26% 		24.6 MB/s
4K Write
Avg. 4K Random Write Speed 		85.6 MB/s Slightly faster random write.
+8% 		79 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		303 MB/s Much faster mixed IO speed.
+69% 		179 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		39.5 MB/s Faster random mixed IO.
+19% 		33.2 MB/s
SusWrite
Avg. Sustained Write Speed 		312 MB/s Hugely faster sustained write speed.
+209% 		101 MB/s
Peak Score 
+40%
Read
Peak Sequential Read Speed 		510 MB/s Faster peak read speed.
+15% 		445 MB/s
Write
Peak Sequential Write Speed 		480 MB/s Much faster peak write speed.
+74% 		276 MB/s
4K Read
Peak 4K Random Read Speed 		36.1 MB/s Slightly faster peak random read.
+8% 		33.4 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 Much faster peak mixed IO speed.
+30% 		283 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		47.6 MB/s Faster peak random mixed IO.
+21% 		39.3 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		477 MB/s Hugely faster peak sustained write speed.
+134% 		204 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,435,760 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.
+38% 		5.93 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$175 $73 Much cheaper.
+58%
Nice To Haves 
+66%
Age
Newest 		145 Months Slightly more recent.
+9% 		159 Months
DQ Read
Peak 4K-64Thread Read Speed 		385 MB/s Much faster peak deep queue read.
+75% 		220 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		334 MB/s Faster peak deep queue write.
+29% 		259 MB/s
AS-SSD Total
AS-SSD Total Score 		1,221 Pts Much stronger server IO.
+43% 		854 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		176 MB/s +4% 170 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		346 MB/s Hugely faster deep queue read.
+226% 		106 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s Hugely faster deep queue write.
+98% 		132 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		147 MB/s Much faster deep queue mixed IO.
+47% 		100 MB/s
Specifications 
Capacity
Capacity 		256GB 120GB
Conclusion 
Average Bench 95%
Average Bench 63%

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]

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Solid State Drives
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