SamsungMZ-7PD256BW
SamsungMZ-7PC128B/WW
$109

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

 $109 

Controller: Samsung 3-core MCX. NAND: Samsung 27nm Toggle Mode MLC. Release date: Q4 2011.

Real World Speed
Performance profile from 97,952 user samples
65,256 User Benchmarks
Best Bench: 117% 221GB free
Worst Bench: 63% 210GB free (System drive)
Poor: 63% Great: 117%
SPEED RANK: 272nd / 1058
32,696 User Benchmarks
Best Bench: 76% 352GB free
Worst Bench: 46% 41GB free (System drive)
Poor: 46% Great: 76%
SPEED RANK: 749th / 1058
Effective Speed
Effective SSD Speed
94.2 % Much faster effective speed.
+49%
63.3 %
Read
Avg. Sequential Read Speed
461 MB/s Slightly faster read speed.
+5%
438 MB/s
Write
Avg. Sequential Write Speed
370 MB/s Much faster write speed.
+67%
221 MB/s
4K Read
Avg. 4K Random Read Speed
30.6 MB/s Much faster random read.
+49%
20.6 MB/s
4K Write
Avg. 4K Random Write Speed
82.8 MB/s Much faster random write.
+61%
51.4 MB/s
Mixed
Avg. Sequential Mixed IO Speed
301 MB/s Much faster mixed IO speed.
+36%
222 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
39 MB/s Hugely faster random mixed IO.
+81%
21.6 MB/s
SusWrite
Avg. Sustained Write Speed
319 MB/s Much faster sustained write speed.
+58%
202 MB/s
Read
Peak Sequential Read Speed
510 MB/s +4% 491 MB/s
Write
Peak Sequential Write Speed
480 MB/s Much faster peak write speed.
+53%
313 MB/s
4K Read
Peak 4K Random Read Speed
36.3 MB/s Much faster peak random read.
+53%
23.8 MB/s
4K Write
Peak 4K Random Write Speed
115 MB/s Much faster peak random write.
+78%
64.7 MB/s
Mixed
Peak Sequential Mixed IO Speed
364 MB/s Faster peak mixed IO speed.
+26%
290 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
47.6 MB/s Hugely faster peak random mixed IO.
+87%
25.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
474 MB/s Much faster peak sustained write speed.
+55%
306 MB/s
Market Share
Based on 47,021,533 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.09 % Hugely higher market share.
+125%
0.04 %
Value
Value For Money
7.13 % Much better value.
+54%
4.64 %
User Rating
UBM User Rating
54 % +4% 52 %
Price
Price (score)
$209 $109 Much cheaper.
+48%
Age
Newest
107 Months More recent.
+10%
119 Months
DQ Read
Peak 4K-64Thread Read Speed
385 MB/s Much faster peak deep queue read.
+31%
295 MB/s
DQ Write
Peak 4K-64Thread Write Speed
333 MB/s Hugely faster peak deep queue write.
+286%
86.2 MB/s
AS-SSD Total
AS-SSD Total Score
1,221 Pts Much stronger server IO.
+66%
737 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s Much faster peak deep queue mixed IO.
+31%
134 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
332 MB/s Faster deep queue read.
+27%
262 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
252 MB/s Hugely faster deep queue write.
+268%
68.4 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
143 MB/s Much faster deep queue mixed IO.
+35%
106 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 Samsung 830 is nearly two and a half years old which puts it at a significant disadvantage to more recent models. With peak and average sequential read/write speeds of 512/323 and 410/239 MB/s it's not too shabby, especially considering its age. The sequential figures actually match the current group leaders. The small file 4K peak and average read/write speeds of 22.5/60.3 and 17/40 MB/s are not as impressive and lag the group leaders by 50%. Reduced small file performance weighs on the 128GB 830's effective speed which is 376 MB/s and 20% lower than the average of 453 MB/s for the highest voted group leaders. Finally comparing the 128 and 256GB versions shows that the larger drive has a superior performance profile, which is not uncommon for SSDs but newer models from Samsung don't share this trait. [Feb '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) September 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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.

 Frequently Asked Questions

 Best User Rated

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