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SanDiskSDSSDX-240G-G25
SamsungMZ-7PD256BW
▲ 51812 ▼

Controller: SandForce SF2281VB1-SDC. NAND: SanDisk 24nm Toggle Mode MLC. Release date: Q1 2012.

VS
▲ 5420,557 ▼

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

Effective Speed 
+25%
Real World Speed
Performance profile from 80,153 user samples
Benchmark your SSD here
7,034 User Benchmarks
Best Bench: 91% 220GB free
Worst Bench: 55% 47GB free (System drive)
Poor: 55% Great: 91%
SPEED RANK: 561st / 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 		76.2 % 95 % Faster effective speed.
+25%
Average Score 
+30%
Read
Avg. Sequential Read Speed 		375 MB/s 459 MB/s Faster read speed.
+22%
Write
Avg. Sequential Write Speed 		232 MB/s 367 MB/s Much faster write speed.
+58%
4K Read
Avg. 4K Random Read Speed 		30 MB/s 31 MB/s +3%
4K Write
Avg. 4K Random Write Speed 		77.4 MB/s 85.6 MB/s Faster random write.
+11%
Mixed
Avg. Sequential Mixed IO Speed 		253 MB/s 303 MB/s Faster mixed IO speed.
+20%
4K Mixed
Avg. 4K Random Mixed IO Speed 		34.7 MB/s 39.5 MB/s Faster random mixed IO.
+14%
SusWrite
Avg. Sustained Write Speed 		172 MB/s 312 MB/s Hugely faster sustained write speed.
+81%
Peak Score 
+38%
Read
Peak Sequential Read Speed 		436 MB/s 510 MB/s Faster peak read speed.
+17%
Write
Peak Sequential Write Speed 		260 MB/s 480 MB/s Hugely faster peak write speed.
+85%
4K Read
Peak 4K Random Read Speed 		36.7 MB/s +2% 36.1 MB/s
4K Write
Peak 4K Random Write Speed 		115 MB/s +1% 114 MB/s
Mixed
Peak Sequential Mixed IO Speed 		276 MB/s 368 MB/s Much faster peak mixed IO speed.
+33%
4K Mixed
Peak 4K Random Mixed IO Speed 		43.9 MB/s 47.6 MB/s Slightly faster peak random mixed IO.
+8%
SusWrite
Peak Sequential Sustained Write 60s Average 		212 MB/s 477 MB/s Hugely faster peak sustained write speed.
+125%
Value & Sentiment 
+116%
Market Share
Based on 77,595,335 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 		5.68 % 8.21 % Much better value.
+45%
User Rating
UBM User Rating 		51 % 54 % Slightly more popular.
+6%
Price
Price (score) 		$200 $175 Cheaper.
+13%
Nice To Haves 
+11%
Age
Newest 		153 Months 145 Months Slightly more recent.
+5%
DQ Read
Peak 4K-64Thread Read Speed 		302 MB/s 385 MB/s Faster peak deep queue read.
+27%
DQ Write
Peak 4K-64Thread Write Speed 		241 MB/s 334 MB/s Much faster peak deep queue write.
+39%
AS-SSD Total
AS-SSD Total Score 		965 Pts 1,221 Pts Stronger server IO.
+26%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		240 MB/s Much faster peak deep queue mixed IO.
+36% 		176 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		272 MB/s 346 MB/s Faster deep queue read.
+27%
ADQ Write
Avg. 4K-64Thread Write Speed 		203 MB/s 262 MB/s Faster deep queue write.
+29%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		191 MB/s Faster deep queue mixed IO.
+30% 		147 MB/s
Specifications 
Capacity
Capacity 		240GB 256GB
Conclusion 
Average Bench 76.2%
Average Bench 95%

The Sandisk Extreme was once a good choice of SSD thanks to its extremely (pun intended) competitive price. In terms of performance the Extreme would of course obliterate any regular hard drive but at 16 months old the Extreme can no longer compete with more recent SSDs. In terms of typical consumer workloads the Sandisk delivers below average performance and is even less capable when it comes to server workloads scoring a total of just 761 on the AS-SSD benchmark. The weaknesses in performance are a consequence of the now dated Sandforce SF2281VB1 controller which delivers sub-optimal compressible transfer rates. The best thing the Sandisk Extreme has going for it is that its successor, the Extreme II, was just recently released. [Jun '13 SSDrivePro]

MORE DETAILS

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

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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

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Solid State Drives
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