SamsungMZ-7PD256BW
SamsungMZ-7PD128BW

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

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

Real World Speed
Performance profile from 86,327 user samples
57,068 User Benchmarks
Best Bench: 116% 128GB free
Worst Bench: 66% 70GB free (System drive)
Poor: 66% Great: 116%
SPEED RANK: 273rd / 1058
29,259 User Benchmarks
Best Bench: 112% 98GB free
Worst Bench: 63% 93GB free (System drive)
Poor: 63% Great: 112%
SPEED RANK: 334th / 1058
Effective Speed
Effective SSD Speed
94.3 % Slightly faster effective speed.
+6%
88.9 %
Read
Avg. Sequential Read Speed
466 MB/s +4% 448 MB/s
Write
Avg. Sequential Write Speed
381 MB/s Faster write speed.
+15%
331 MB/s
4K Read
Avg. 4K Random Read Speed
30.8 MB/s +1% 30.6 MB/s
4K Write
Avg. 4K Random Write Speed
81.8 MB/s +2% 80.3 MB/s
Mixed
Avg. Sequential Mixed IO Speed
303 MB/s Faster mixed IO speed.
+15%
264 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
38.8 MB/s Slightly faster random mixed IO.
+9%
35.7 MB/s
SusWrite
Avg. Sustained Write Speed
317 MB/s Faster sustained write speed.
+13%
281 MB/s
Read
Peak Sequential Read Speed
509 MB/s +2% 497 MB/s
Write
Peak Sequential Write Speed
480 MB/s Slightly faster peak write speed.
+7%
448 MB/s
4K Read
Peak 4K Random Read Speed
36.3 MB/s 36.3 MB/s
4K Write
Peak 4K Random Write Speed
114 MB/s +1% 113 MB/s
Mixed
Peak Sequential Mixed IO Speed
364 MB/s Faster peak mixed IO speed.
+11%
329 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
47.1 MB/s Slightly faster peak random mixed IO.
+7%
44.2 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
472 MB/s Slightly faster peak sustained write speed.
+7%
442 MB/s
Market Share
Based on 43,099,589 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.09 % Much higher market share.
+50%
0.06 %
Value
Value For Money
10.2 % Hugely better value.
+110%
4.89 %
User Rating
UBM User Rating
54 % 54 %
Price
Price (score)
$129 Cheaper.
+19%
$160
Age
Newest
103 Months 103 Months
DQ Read
Peak 4K-64Thread Read Speed
385 MB/s +2% 376 MB/s
DQ Write
Peak 4K-64Thread Write Speed
334 MB/s +3% 325 MB/s
AS-SSD Total
AS-SSD Total Score
1221 Pts +2% 1,192 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s Faster peak deep queue mixed IO.
+12%
156 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
336 MB/s +3% 327 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
258 MB/s Slightly faster deep queue write.
+9%
236 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
144 MB/s Faster deep queue mixed IO.
+17%
123 MB/s
Capacity
Capacity
256GB 128GB
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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 128GB 840 Pro is a rock solid performer. On release, nearly a year and a half ago, the Pro smashed several speed records. Today, with sequential read/write speeds of 519/438 MBps, the Pro is still one of the fastest SSDs available. One of the Pro's top competitors is Samsungs own, newer 840 Evo. Looking at a raw synthetic speed comparison of the 128GB Pro and Evo is a little misleading. On the face of it the Pro only has a marginal lead over the Evo. This due to the fact that the Evo can only maintain its burst write speed for transfers of up to 3GB, the size of its SLC cache. The Pro on the other hand can sustain higher throughputs indefinitely. The Pro also utilizes MLC which is rated for far more erase cycles than the TLC used in the Evo. Server IO is often continuous and would quickly exhaust the 3GB cache on the Evo but for typical consumer use the Evo will remain within the SLC cache most of the time. [Feb '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) May 2021 SSD Rankings.

Welcome to our 2.5" and M.2 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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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

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HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $102SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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