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 51,235 user samples
34,589 User Benchmarks
Best Bench: 116% 238GB free
Worst Bench: 62% 105GB free (System drive)
Poor: 62% Great: 116%
SPEED RANK: 228th / 992
16,646 User Benchmarks
Best Bench: 110% 119GB free
Worst Bench: 60% 60GB free (System drive)
Poor: 60% Great: 110%
SPEED RANK: 280th / 992
Effective Speed
Effective SSD Speed
91.5 % +5% 87.3 %
Read
Avg. Sequential Read Speed
454 MB/s +4% 438 MB/s
Write
Avg. Sequential Write Speed
357 MB/s Slightly faster write speed.
+13%
316 MB/s
4K Read
Avg. 4K Random Read Speed
30.2 MB/s 30.4 MB/s +1%
4K Write
Avg. 4K Random Write Speed
84.1 MB/s 84.4 MB/s +0%
Mixed
Avg. Sequential Mixed IO Speed
289 MB/s Slightly faster mixed IO speed.
+12%
257 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
38.2 MB/s Slightly faster random mixed IO.
+8%
35.4 MB/s
SusWrite
Avg. Sustained Write Speed
284 MB/s Slightly faster sustained write speed.
+10%
258 MB/s
Read
Peak Sequential Read Speed
509 MB/s +3% 492 MB/s
Write
Peak Sequential Write Speed
480 MB/s Slightly faster peak write speed.
+8%
445 MB/s
4K Read
Peak 4K Random Read Speed
36.3 MB/s 36.4 MB/s +0%
4K Write
Peak 4K Random Write Speed
117 MB/s 117 MB/s
Mixed
Peak Sequential Mixed IO Speed
355 MB/s Slightly faster peak mixed IO speed.
+9%
325 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
46.8 MB/s Slightly faster peak random mixed IO.
+6%
44.1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
477 MB/s Slightly faster peak sustained write speed.
+10%
433 MB/s
Market Share
Based on 12,966,448 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.27 % Much higher market share.
+59%
0.17 %
Value
Value For Money
78 % Hugely better value.
+119%
35.7 %
User Rating
UBM User Rating
63 % 63 %
Price
Price (score)
$120 Cheaper.
+25%
$160
Age
Newest
77 Months 77 Months
DQ Read
Peak 4K-64Thread Read Speed
384 MB/s +2% 377 MB/s
DQ Write
Peak 4K-64Thread Write Speed
333 MB/s +2% 326 MB/s
AS-SSD Total
AS-SSD Total Score
1,222 Pts +2% 1,197 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s Slightly faster peak deep queue mixed IO.
+13%
155 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
334 MB/s +3% 323 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
256 MB/s Slightly faster deep queue write.
+8%
238 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
139 MB/s Faster deep queue mixed IO.
+16%
120 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) March 2019 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

The Best.
CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $364Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $761SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110SanDisk Ultra Fit 32GB $12
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