SamsungMZ-7PD256BW
SamsungMZ-7PD128BW

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Real World Speed
Performance profile from 29,298 user samples
18,090 User Benchmarks
Best Bench: 109% 93GB free
Worst Bench: 52% 56GB free
Poor: 52% Great: 109%
SPEED RANK: 149th / 873
11,208 User Benchmarks
Best Bench: 98% 102GB free
Worst Bench: 55% 6GB free
Poor: 55% Great: 98%
SPEED RANK: 219th / 873
Effective Speed
Effective SSD Speed
83.5 % Slightly faster effective speed.
+6%
79.1 % -6%
Read
Avg. Sequential Read Speed
483 MB/s -0% 485 MB/s +0%
Write
Avg. Sequential Write Speed
349 MB/s Faster write speed.
+16%
302 MB/s -16%
4K Read
Avg. 4K Random Read Speed
29 MB/s -0% 29.1 MB/s +0%
4K Write
Avg. 4K Random Write Speed
79.8 MB/s +1% 79.2 MB/s -1%
Mixed
Avg. Sequential Mixed IO Speed
381 MB/s Faster mixed IO speed.
+15%
330 MB/s -15%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.2 MB/s Slightly faster random mixed IO.
+9%
20.3 MB/s -9%
Read
Peak Sequential Read Speed
523 MB/s +0% 521 MB/s -0%
Write
Peak Sequential Write Speed
496 MB/s Slightly faster peak write speed.
+13%
438 MB/s -13%
4K Read
Peak 4K Random Read Speed
36.5 MB/s +2% 35.9 MB/s -2%
4K Write
Peak 4K Random Write Speed
117 MB/s +1% 116 MB/s -1%
Mixed
Peak Sequential Mixed IO Speed
509 MB/s Slightly faster peak mixed IO speed.
+7%
475 MB/s -7%
4K Mixed
Peak 4K Random Mixed IO Speed
29.2 MB/s Faster peak random mixed IO.
+16%
25.1 MB/s -16%
Market Share
Based on 4,776,024 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.45 % Higher market share.
+25%
0.36 % -25%
Value
Value For Money
48.7 % Much better value.
+51%
32.3 % -51%
User Rating
UBM User Rating
63 % 0% 63 % 0%
Price
Price (score)
$199 -20% $160 Cheaper.
+20%
Age
Newest
62 Months 0% 62 Months 0%
DQ Read
Peak 4K-64Thread Read Speed
375 MB/s +2% 368 MB/s -2%
DQ Write
Peak 4K-64Thread Write Speed
319 MB/s +3% 311 MB/s -3%
AS-SSD Total
AS-SSD Total Score
1,198 Pts +3% 1,169 Pts -3%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
90.6 MB/s Faster peak deep queue mixed IO.
+18%
76.8 MB/s -18%
ADQ Read
Avg. 4K-64Thread Read Speed
210 MB/s Slightly faster deep queue read.
+8%
195 MB/s -8%
ADQ Write
Avg. 4K-64Thread Write Speed
194 MB/s Slightly faster deep queue write.
+8%
179 MB/s -8%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
55.6 MB/s Faster deep queue mixed IO.
+21%
46.1 MB/s -21%
Capacity
Capacity
256GB 128GB
ADVERTISEMENT

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) December 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $245AMD RX 480 $265Samsung 850 Pro 256GB $110
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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