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Samsung
SamsungMZ-7PD256BW
  

Release date ≈ Q3 2014.

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

Real World Speed
Performance profile from 75,207 user samples
2,088 User Benchmarks
Best Bench: 108% 179GB free (System drive)
Worst Bench: 60% 111GB free (System drive)
Poor: 60% Great: 108%
SPEED RANK: 445th / 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
83.2 % 95 % Faster effective speed.
+14%
Read
Avg. Sequential Read Speed
436 MB/s 459 MB/s Slightly faster read speed.
+5%
Write
Avg. Sequential Write Speed
263 MB/s 367 MB/s Much faster write speed.
+40%
4K Read
Avg. 4K Random Read Speed
27.1 MB/s 31 MB/s Faster random read.
+14%
4K Write
Avg. 4K Random Write Speed
66.7 MB/s 85.6 MB/s Faster random write.
+28%
Mixed
Avg. Sequential Mixed IO Speed
272 MB/s 303 MB/s Faster mixed IO speed.
+11%
4K Mixed
Avg. 4K Random Mixed IO Speed
34 MB/s 39.5 MB/s Faster random mixed IO.
+16%
SusWrite
Avg. Sustained Write Speed
264 MB/s 312 MB/s Faster sustained write speed.
+18%
Read
Peak Sequential Read Speed
506 MB/s 510 MB/s +1%
Write
Peak Sequential Write Speed
386 MB/s 480 MB/s Faster peak write speed.
+24%
4K Read
Peak 4K Random Read Speed
36.2 MB/s +0% 36.1 MB/s
4K Write
Peak 4K Random Write Speed
110 MB/s 114 MB/s +4%
Mixed
Peak Sequential Mixed IO Speed
326 MB/s 368 MB/s Faster peak mixed IO speed.
+13%
4K Mixed
Peak 4K Random Mixed IO Speed
46.6 MB/s 47.6 MB/s +2%
SusWrite
Peak Sequential Sustained Write 60s Average
399 MB/s 477 MB/s Faster peak sustained write speed.
+20%
Market Share
Based on 77,137,183 SSDs tested
Market Share
Market Share (trailing 30 days)
0 % 0.06 % Insanely higher market share.
+∞%
User Rating
UBM User Rating
50 % 54 % Slightly more popular.
+8%
Age
Newest
122+ Months More recent.
+15%
144 Months
DQ Read
Peak 4K-64Thread Read Speed
383 MB/s 385 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
293 MB/s 334 MB/s Faster peak deep queue write.
+14%
AS-SSD Total
AS-SSD Total Score
1,158 Pts 1,221 Pts Slightly stronger server IO.
+5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
168 MB/s 176 MB/s +5%
ADQ Read
Avg. 4K-64Thread Read Speed
342 MB/s 346 MB/s +1%
ADQ Write
Avg. 4K-64Thread Write Speed
222 MB/s 262 MB/s Faster deep queue write.
+18%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
148 MB/s +1% 147 MB/s
Capacity
Capacity
256GB 256GB

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

Solid State Drive Rankings (Price vs Performance) October 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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