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SamsungMZ-7PD256BW
OCZVTX460-25SAT3-120G
▲ 5420,557 ▼

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

VS
▲ 5192 ▼

Controller: Indilinx Barefoot 3 M10. Flash Memory: Toshiba 19nm MLC. Release date: Q1 2014.

Effective Speed 
+14%
Real World Speed
Performance profile from 74,130 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
1,011 User Benchmarks
Best Bench: 100% 72GB free (System drive)
Worst Bench: 61% 33GB free (System drive)
Poor: 61% Great: 100%
SPEED RANK: 449th / 1080
Effective Speed
Effective SSD Speed 		95 % Faster effective speed.
+14% 		83 %
Average Score 
+12%
Read
Avg. Sequential Read Speed 		459 MB/s Slightly faster read speed.
+8% 		425 MB/s
Write
Avg. Sequential Write Speed 		367 MB/s +1% 363 MB/s
4K Read
Avg. 4K Random Read Speed 		31 MB/s Much faster random read.
+37% 		22.7 MB/s
4K Write
Avg. 4K Random Write Speed 		85.6 MB/s 87.9 MB/s +3%
Mixed
Avg. Sequential Mixed IO Speed 		303 MB/s 307 MB/s +1%
4K Mixed
Avg. 4K Random Mixed IO Speed 		39.5 MB/s Faster random mixed IO.
+25% 		31.7 MB/s
SusWrite
Avg. Sustained Write Speed 		312 MB/s Faster sustained write speed.
+17% 		266 MB/s
Peak Score 
+13%
Read
Peak Sequential Read Speed 		510 MB/s Slightly faster peak read speed.
+7% 		476 MB/s
Write
Peak Sequential Write Speed 		480 MB/s Faster peak write speed.
+15% 		416 MB/s
4K Read
Peak 4K Random Read Speed 		36.1 MB/s Much faster peak random read.
+35% 		26.8 MB/s
4K Write
Peak 4K Random Write Speed 		114 MB/s 125 MB/s Slightly faster peak random write.
+10%
Mixed
Peak Sequential Mixed IO Speed 		368 MB/s Slightly faster peak mixed IO speed.
+6% 		348 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		47.6 MB/s Faster peak random mixed IO.
+24% 		38.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		477 MB/s Faster peak sustained write speed.
+16% 		410 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,554,666 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 % Hugely better value.
+123% 		3.68 %
User Rating
UBM User Rating 		54 % Slightly more popular.
+6% 		51 %
Price
Price (score) 		$175 Cheaper.
+13% 		$200
Nice To Haves 
+12%
Age
Newest 		145 Months 129 Months More recent.
+11%
DQ Read
Peak 4K-64Thread Read Speed 		385 MB/s Faster peak deep queue read.
+20% 		321 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		334 MB/s 351 MB/s Slightly faster peak deep queue write.
+5%
AS-SSD Total
AS-SSD Total Score 		1,221 Pts Slightly stronger server IO.
+9% 		1,121 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		176 MB/s 285 MB/s Much faster peak deep queue mixed IO.
+62%
ADQ Read
Avg. 4K-64Thread Read Speed 		346 MB/s Faster deep queue read.
+24% 		280 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s 283 MB/s Slightly faster deep queue write.
+8%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		147 MB/s 235 MB/s Much faster deep queue mixed IO.
+60%
Specifications 
Capacity
Capacity 		256GB 120GB
Conclusion 
Average Bench 95%
Average Bench 83%

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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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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 Frequently Asked Questions

Storage Devices FAQ
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Solid State Drives
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What is 4K 64 thread write speed?
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