SamsungMZ-7PD256BW
SamsungMZ-75E250B

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

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND. Release date: Q4 2014.

Real World Speed
Performance profile from 462,554 user samples
29,818 User Benchmarks
Best Bench: 116% 100GB free
Worst Bench: 62% 85GB free
Poor: 62% Great: 116%
SPEED RANK: 224th / 1003
432,736 User Benchmarks
Best Bench: 125% 46GB free
Worst Bench: 72% 94GB free (System drive)
Poor: 72% Great: 125%
SPEED RANK: 180th / 1003
Effective Speed
Effective SSD Speed
93.2 % 105 % Slightly faster effective speed.
+13%
Read
Avg. Sequential Read Speed
459 MB/s 468 MB/s +2%
Write
Avg. Sequential Write Speed
369 MB/s 435 MB/s Faster write speed.
+18%
4K Read
Avg. 4K Random Read Speed
30.2 MB/s 39.7 MB/s Much faster random read.
+31%
4K Write
Avg. 4K Random Write Speed
83.7 MB/s 99.9 MB/s Faster random write.
+19%
Mixed
Avg. Sequential Mixed IO Speed
297 MB/s 369 MB/s Faster mixed IO speed.
+24%
4K Mixed
Avg. 4K Random Mixed IO Speed
38.4 MB/s 53.3 MB/s Much faster random mixed IO.
+39%
SusWrite
Avg. Sustained Write Speed
303 MB/s Faster sustained write speed.
+22%
248 MB/s
Read
Peak Sequential Read Speed
509 MB/s +0% 507 MB/s
Write
Peak Sequential Write Speed
483 MB/s 492 MB/s +2%
4K Read
Peak 4K Random Read Speed
36.5 MB/s 48.2 MB/s Much faster peak random read.
+32%
4K Write
Peak 4K Random Write Speed
120 MB/s 135 MB/s Slightly faster peak random write.
+12%
Mixed
Peak Sequential Mixed IO Speed
359 MB/s 414 MB/s Faster peak mixed IO speed.
+15%
4K Mixed
Peak 4K Random Mixed IO Speed
48.4 MB/s 66.5 MB/s Much faster peak random mixed IO.
+37%
SusWrite
Peak Sequential Sustained Write 60s Average
474 MB/s Much faster peak sustained write speed.
+47%
323 MB/s
Market Share
Based on 15,002,319 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.21 % 3.13 % Insanely higher market share.
+1,390%
Value
Value For Money
98.6 % 113 % Slightly better value.
+14%
User Rating
UBM User Rating
64 % 128 % Hugely more popular.
+100%
Price
Price (score)
$90 $86 +4%
Age
Newest
80 Months 54 Months Much more recent.
+32%
DQ Read
Peak 4K-64Thread Read Speed
386 MB/s +0% 385 MB/s
DQ Write
Peak 4K-64Thread Write Speed
332 MB/s 361 MB/s Slightly faster peak deep queue write.
+9%
AS-SSD Total
AS-SSD Total Score
1,227 Pts 1,294 Pts Slightly stronger server IO.
+5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s 366 MB/s Hugely faster peak deep queue mixed IO.
+109%
ADQ Read
Avg. 4K-64Thread Read Speed
341 MB/s 347 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
264 MB/s 314 MB/s Faster deep queue write.
+19%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
144 MB/s 320 MB/s Hugely faster deep queue mixed IO.
+122%
Capacity
Capacity
256GB 250GB
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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 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) June 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 $365Nvidia GTX 1070 $390Samsung 850 Evo 250GB $86
AMD Ryzen 5 2600 $144Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $100
AMD Ryzen 7 2700X $280Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $79SanDisk Extreme 64GB $128
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $639SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $85SanDisk Ultra Fit 32GB $12
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