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OCZARC100-25SAT3-120G
SamsungMZ-7PD256BW
▲ 54448 ▼

Controller: Indilinx Barefoot 3. Flash Memory: Toshiba A19nm MLC. Release date: Q3 2014.

VS
▲ 5420,557 ▼

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

Effective Speed 
+13%
Real World Speed
Performance profile from 77,854 user samples
Benchmark your SSD here
4,735 User Benchmarks
Best Bench: 98% 223GB free
Worst Bench: 63% 20GB free (System drive)
Poor: 63% Great: 98%
SPEED RANK: 435th / 1080
73,119 User Benchmarks
Best Bench: 116% 238GB free
Worst Bench: 68% 11GB free (System drive)
Poor: 68% Great: 116%
SPEED RANK: 287th / 1080
Effective Speed
Effective SSD Speed 		83.8 % 95 % Faster effective speed.
+13%
Average Score 
+13%
Read
Avg. Sequential Read Speed 		370 MB/s 459 MB/s Faster read speed.
+24%
Write
Avg. Sequential Write Speed 		361 MB/s 367 MB/s +2%
4K Read
Avg. 4K Random Read Speed 		24.5 MB/s 31 MB/s Faster random read.
+27%
4K Write
Avg. 4K Random Write Speed 		87.7 MB/s +2% 85.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		279 MB/s 303 MB/s Slightly faster mixed IO speed.
+9%
4K Mixed
Avg. 4K Random Mixed IO Speed 		32.5 MB/s 39.5 MB/s Faster random mixed IO.
+22%
SusWrite
Avg. Sustained Write Speed 		287 MB/s 312 MB/s Slightly faster sustained write speed.
+9%
Peak Score 
+21%
Read
Peak Sequential Read Speed 		410 MB/s 510 MB/s Faster peak read speed.
+24%
Write
Peak Sequential Write Speed 		383 MB/s 480 MB/s Faster peak write speed.
+25%
4K Read
Peak 4K Random Read Speed 		28.4 MB/s 36.1 MB/s Faster peak random read.
+27%
4K Write
Peak 4K Random Write Speed 		119 MB/s +4% 114 MB/s
Mixed
Peak Sequential Mixed IO Speed 		302 MB/s 368 MB/s Faster peak mixed IO speed.
+22%
4K Mixed
Peak 4K Random Mixed IO Speed 		38 MB/s 47.6 MB/s Faster peak random mixed IO.
+25%
SusWrite
Peak Sequential Sustained Write 60s Average 		370 MB/s 477 MB/s Faster peak sustained write speed.
+29%
Value & Sentiment 
+90%
Market Share
Based on 77,587,458 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.05 % Hugely higher market share.
+400%
Value
Value For Money 		7.21 % 8.21 % Better value.
+14%
User Rating
UBM User Rating 		54 % 54 %
Price
Price (score) 		$82 Much cheaper.
+53% 		$175
Nice To Haves 
+11%
Age
Newest 		123 Months More recent.
+15% 		145 Months
DQ Read
Peak 4K-64Thread Read Speed 		310 MB/s 385 MB/s Faster peak deep queue read.
+24%
DQ Write
Peak 4K-64Thread Write Speed 		359 MB/s Slightly faster peak deep queue write.
+7% 		334 MB/s
AS-SSD Total
AS-SSD Total Score 		1,098 Pts 1,221 Pts Stronger server IO.
+11%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		254 MB/s Much faster peak deep queue mixed IO.
+44% 		176 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		287 MB/s 346 MB/s Faster deep queue read.
+21%
ADQ Write
Avg. 4K-64Thread Write Speed 		305 MB/s Faster deep queue write.
+16% 		262 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		231 MB/s Much faster deep queue mixed IO.
+57% 		147 MB/s
Specifications 
Capacity
Capacity 		120GB 256GB
Conclusion 
Average Bench 83.8%
Average Bench 95%

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 Drive Rankings (Price vs Performance) November 2024 SSD Rankings

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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What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
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What is incompressible data?
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Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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The Best
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Intel Core i5-12400F $111Nvidia RTX 4060 $290WD Black SN850X M.2 2TB $130
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