SamsungMZ-7KE256BW
SamsungMZ-7PD128BW

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

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

Real World Speed
Performance profile from 143,743 user samples
112,900 User Benchmarks
Best Bench: 123% 108GB free
Worst Bench: 73% 32GB free (System drive)
Poor: 73% Great: 123%
SPEED RANK: 234th / 1058
30,843 User Benchmarks
Best Bench: 111% 119GB free
Worst Bench: 62% 25GB free (System drive)
Poor: 62% Great: 111%
SPEED RANK: 322nd / 1058
Effective Speed
Effective SSD Speed
103 % Faster effective speed.
+15%
89.6 %
Read
Avg. Sequential Read Speed
474 MB/s Slightly faster read speed.
+6%
447 MB/s
Write
Avg. Sequential Write Speed
415 MB/s Faster write speed.
+24%
335 MB/s
4K Read
Avg. 4K Random Read Speed
33.5 MB/s Slightly faster random read.
+9%
30.7 MB/s
4K Write
Avg. 4K Random Write Speed
88.3 MB/s Slightly faster random write.
+8%
81.4 MB/s
Mixed
Avg. Sequential Mixed IO Speed
343 MB/s Faster mixed IO speed.
+28%
267 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
43.7 MB/s Faster random mixed IO.
+21%
36 MB/s
SusWrite
Avg. Sustained Write Speed
366 MB/s Faster sustained write speed.
+28%
286 MB/s
Read
Peak Sequential Read Speed
516 MB/s +3% 499 MB/s
Write
Peak Sequential Write Speed
490 MB/s Slightly faster peak write speed.
+10%
446 MB/s
4K Read
Peak 4K Random Read Speed
43.2 MB/s Faster peak random read.
+18%
36.5 MB/s
4K Write
Peak 4K Random Write Speed
121 MB/s Slightly faster peak random write.
+5%
115 MB/s
Mixed
Peak Sequential Mixed IO Speed
384 MB/s Faster peak mixed IO speed.
+17%
328 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
56.5 MB/s Faster peak random mixed IO.
+27%
44.6 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
486 MB/s Faster peak sustained write speed.
+10%
441 MB/s
Market Share
Based on 42,051,966 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.18 % Hugely higher market share.
+260%
0.05 %
Value
Value For Money
9.32 % Hugely better value.
+89%
4.92 %
User Rating
UBM User Rating
54 % 54 %
Price
Price (score)
$164 $160 +3%
Age
Newest
81 Months More recent.
+21%
102 Months
DQ Read
Peak 4K-64Thread Read Speed
388 MB/s +3% 376 MB/s
DQ Write
Peak 4K-64Thread Write Speed
361 MB/s Faster peak deep queue write.
+11%
326 MB/s
AS-SSD Total
AS-SSD Total Score
1,276 Pts Slightly stronger server IO.
+7%
1,195 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
357 MB/s Hugely faster peak deep queue mixed IO.
+130%
155 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
338 MB/s +3% 327 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
289 MB/s Faster deep queue write.
+20%
241 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
298 MB/s Hugely faster deep queue mixed IO.
+142%
123 MB/s
Capacity
Capacity
256GB 128GB
ADVERTISEMENT

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 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) April 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

The Best.
CPUGPUSSD
Intel Core i5-11400F $180Nvidia RTX 3070 $500Crucial MX500 250GB $47
Intel Core i5-10600K $215Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i5-11600K $260Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $40
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $73SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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