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SamsungMZ-7PD256BW
CrucialCT250BX100SSD1
▲ 5420,557 ▼

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

VS
▲ 543,430 ▼

Controller: Silicon Motion SM2246EN. Flash Memory: Micron 16nm MLC. Release date: Q1 2015.

Effective Speed 
+10%
Real World Speed
Performance profile from 116,049 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
42,930 User Benchmarks
Best Bench: 103% 139GB free (System drive)
Worst Bench: 59% 134GB free (System drive)
Poor: 59% Great: 103%
SPEED RANK: 384th / 1080
Effective Speed
Effective SSD Speed 		95 % Slightly faster effective speed.
+10% 		86.6 %
Average Score 
+9%
Read
Avg. Sequential Read Speed 		459 MB/s 475 MB/s +3%
Write
Avg. Sequential Write Speed 		367 MB/s Slightly faster write speed.
+5% 		349 MB/s
4K Read
Avg. 4K Random Read Speed 		31 MB/s Faster random read.
+18% 		26.2 MB/s
4K Write
Avg. 4K Random Write Speed 		85.6 MB/s Faster random write.
+11% 		76.9 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		303 MB/s Slightly faster mixed IO speed.
+7% 		284 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		39.5 MB/s Faster random mixed IO.
+10% 		35.8 MB/s
SusWrite
Avg. Sustained Write Speed 		312 MB/s Faster sustained write speed.
+12% 		278 MB/s
Peak Score 
+14%
Read
Peak Sequential Read Speed 		510 MB/s 514 MB/s +1%
Write
Peak Sequential Write Speed 		480 MB/s Faster peak write speed.
+30% 		370 MB/s
4K Read
Peak 4K Random Read Speed 		36.1 MB/s Faster peak random read.
+19% 		30.3 MB/s
4K Write
Peak 4K Random Write Speed 		114 MB/s +4% 110 MB/s
Mixed
Peak Sequential Mixed IO Speed 		368 MB/s Slightly faster peak mixed IO speed.
+9% 		338 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		47.6 MB/s Slightly faster peak random mixed IO.
+8% 		44.1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		477 MB/s Much faster peak sustained write speed.
+31% 		364 MB/s
Value & Sentiment 
+14%
Market Share
Based on 77,604,381 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.05 % Hugely higher market share.
+150% 		0.02 %
Value
Value For Money 		8.21 % 12.1 % Much better value.
+47%
User Rating
UBM User Rating 		54 % 54 %
Price
Price (score) 		$175 $91 Much cheaper.
+48%
Nice To Haves 
+5%
Age
Newest 		145 Months 118 Months More recent.
+19%
DQ Read
Peak 4K-64Thread Read Speed 		385 MB/s Much faster peak deep queue read.
+37% 		281 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		334 MB/s +3% 324 MB/s
AS-SSD Total
AS-SSD Total Score 		1,221 Pts Stronger server IO.
+19% 		1,023 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		176 MB/s 198 MB/s Faster peak deep queue mixed IO.
+12%
ADQ Read
Avg. 4K-64Thread Read Speed 		346 MB/s Much faster deep queue read.
+34% 		259 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		262 MB/s 274 MB/s +5%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		147 MB/s 173 MB/s Faster deep queue mixed IO.
+18%
Specifications 
Capacity
Capacity 		256GB 250GB
Conclusion 
Average Bench 95%
Average Bench 86.6%

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

The 250GB Crucial BX100 SSD is the value orientated variant of Crucial's M range of SSDs. The BX100 uses the same NAND as its premium MX200 sibling but the BX100 uses a Silicon Motion controller as opposed to the Marvel controller found in the MX range. Feature wise the BX100 is missing SLC caching and there is no hardware encryption (so security frameworks such as windows Bitlocker will operate less efficiently). In terms of I/O performance the BX100 looks promising. Comparing the BX100 and MX100 shows that the newer BX100 may be faster than its predecessor but as yet there are insufficient user benchmarks to draw any definitive conclusions. The BX100 has only just started hitting the shelves so there's plenty of room for price reductions from its already reasonable price tag. I will revisit this review when I have more performance data for the BX100. [Jan '15 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]

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
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Solid State Drives
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The Best
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Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $330
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