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SamsungMZ-7PD256BW
Patriot
▲ 5420,557 ▼

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

VS
▲ 500 ▼
  

Controller: SandForce SF2281. NAND Memory: Toshiba 32 nm MLC. Release date ≤ Q1 2014.

Effective Speed 
+35%
Real World Speed
Performance profile from 73,199 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
80 User Benchmarks
Best Bench: 90% 119GB free
Worst Bench: 51% 44GB free (System drive)
Poor: 51% Great: 90%
SPEED RANK: 672nd / 1080
Effective Speed
Effective SSD Speed 		95 % Much faster effective speed.
+35% 		70.3 %
Average Score 
+38%
Read
Avg. Sequential Read Speed 		459 MB/s Faster read speed.
+12% 		408 MB/s
Write
Avg. Sequential Write Speed 		367 MB/s Much faster write speed.
+69% 		217 MB/s
4K Read
Avg. 4K Random Read Speed 		31 MB/s Faster random read.
+19% 		26 MB/s
4K Write
Avg. 4K Random Write Speed 		85.6 MB/s Faster random write.
+17% 		73.3 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		303 MB/s Faster mixed IO speed.
+18% 		256 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		39.5 MB/s Much faster random mixed IO.
+53% 		25.8 MB/s
SusWrite
Avg. Sustained Write Speed 		312 MB/s Hugely faster sustained write speed.
+80% 		173 MB/s
Peak Score 
+26%
Read
Peak Sequential Read Speed 		510 MB/s 510 MB/s
Write
Peak Sequential Write Speed 		480 MB/s Much faster peak write speed.
+78% 		269 MB/s
4K Read
Peak 4K Random Read Speed 		36.1 MB/s Faster peak random read.
+10% 		32.8 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.
+15% 		319 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		47.6 MB/s Faster peak random mixed IO.
+15% 		41.5 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		477 MB/s Much faster peak sustained write speed.
+60% 		299 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,562,215 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.03 % Insanely higher market share.
+∞% 		0 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+8% 		50 %
Nice To Haves 
+16%
Age
Newest 		145 Months 128+ Months More recent.
+12%
DQ Read
Peak 4K-64Thread Read Speed 		385 MB/s Faster peak deep queue read.
+27% 		303 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		334 MB/s Much faster peak deep queue write.
+40% 		239 MB/s
AS-SSD Total
AS-SSD Total Score 		1,221 Pts Stronger server IO.
+27% 		962 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		176 MB/s 287 MB/s Much faster peak deep queue mixed IO.
+63%
ADQ Read
Avg. 4K-64Thread Read Speed 		346 MB/s Much faster deep queue read.
+56% 		222 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s Much faster deep queue write.
+46% 		179 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		147 MB/s +4% 142 MB/s
Specifications 
Capacity
Capacity 		256GB 240GB
Conclusion 
Average Bench 95%
Average Bench 70.3%

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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