SamsungMZ-7PD128BW
SamsungMZ-7PC256B/WW
$261

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

 $261 

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

Real World Speed
Performance profile from 61,959 user samples
37,417 User Benchmarks
Best Bench: 109% 64GB free (System drive)
Worst Bench: 62% 12GB free (System drive)
Poor: 62% Great: 109%
SPEED RANK: 332nd / 1058
24,542 User Benchmarks
Best Bench: 85% 212GB free
Worst Bench: 51% 33GB free (System drive)
Poor: 51% Great: 85%
SPEED RANK: 633rd / 1058
Effective Speed
Effective SSD Speed
88.9 % Faster effective speed.
+25%
71.1 %
Read
Avg. Sequential Read Speed
446 MB/s 447 MB/s +0%
Write
Avg. Sequential Write Speed
332 MB/s Faster write speed.
+16%
286 MB/s
4K Read
Avg. 4K Random Read Speed
30.6 MB/s Much faster random read.
+46%
21 MB/s
4K Write
Avg. 4K Random Write Speed
81.1 MB/s Much faster random write.
+38%
58.8 MB/s
Mixed
Avg. Sequential Mixed IO Speed
267 MB/s Slightly faster mixed IO speed.
+6%
251 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
35.7 MB/s Much faster random mixed IO.
+43%
24.9 MB/s
SusWrite
Avg. Sustained Write Speed
278 MB/s +3% 270 MB/s
Read
Peak Sequential Read Speed
495 MB/s 497 MB/s +0%
Write
Peak Sequential Write Speed
448 MB/s Faster peak write speed.
+17%
384 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
112 MB/s Much faster peak random write.
+51%
74.1 MB/s
Mixed
Peak Sequential Mixed IO Speed
329 MB/s Faster peak mixed IO speed.
+10%
299 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
44.1 MB/s Much faster peak random mixed IO.
+52%
29 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
434 MB/s Faster peak sustained write speed.
+11%
390 MB/s
Market Share
Based on 47,073,847 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.05 % Much higher market share.
+67%
0.03 %
Value
Value For Money
4.89 % Slightly better value.
+7%
4.56 %
User Rating
UBM User Rating
54 % +4% 52 %
Price
Price (score)
$160 Much cheaper.
+39%
$261
Age
Newest
107 Months More recent.
+10%
119 Months
DQ Read
Peak 4K-64Thread Read Speed
376 MB/s Faster peak deep queue read.
+27%
296 MB/s
DQ Write
Peak 4K-64Thread Write Speed
326 MB/s Hugely faster peak deep queue write.
+202%
108 MB/s
AS-SSD Total
AS-SSD Total Score
1,191 Pts Much stronger server IO.
+53%
781 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
155 MB/s 157 MB/s +1%
ADQ Read
Avg. 4K-64Thread Read Speed
327 MB/s Faster deep queue read.
+28%
256 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
243 MB/s Hugely faster deep queue write.
+172%
89.5 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
122 MB/s 129 MB/s Slightly faster deep queue mixed IO.
+6%
Capacity
Capacity
128GB 256GB
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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

Almost two years old, the Samsung 830 is one of the oldest SSD's in the group test. The 830 has a reasonably consistent performance profile scoring slightly above average (446 MB/s) for real world use and slightly below average for server use. In all probability the 830 is nearing its end of life and as a result is retailing for approx £50 more than it was just a few months ago. Owners of this drive should feel no pressure to upgrade as the real world performance gains will not be significant but people looking to make a new purchase should steer clear as at its current price of £180 there are far better deals to be had elsewhere. [Apr '13 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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