SamsungMZ-7PD256BW
SamsungMZ-75E250B

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

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

Real World Speed
Performance profile from 196,164 user samples
15,074 User Benchmarks
Best Bench: 107% 90GB free
Worst Bench: 55% 44GB free
Poor: 55% Great: 107%
SPEED RANK: 146th / 860
181,090 User Benchmarks
Best Bench: 116% 99GB free
Worst Bench: 72% 33GB free
Poor: 72% Great: 116%
SPEED RANK: 66th / 860
Effective Speed
Effective SSD Speed
83.4 % -15% 95.9 % Faster effective speed.
+15%
Read
Avg. Sequential Read Speed
494 MB/s -1% 499 MB/s +1%
Write
Avg. Sequential Write Speed
347 MB/s -14% 396 MB/s Slightly faster write speed.
+14%
4K Read
Avg. 4K Random Read Speed
29.2 MB/s -33% 38.8 MB/s Much faster random read.
+33%
4K Write
Avg. 4K Random Write Speed
81.1 MB/s +2% 79.6 MB/s -2%
Mixed
Avg. Sequential Mixed IO Speed
380 MB/s -4% 397 MB/s +4%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.1 MB/s -51% 33.3 MB/s Much faster random mixed IO.
+51%
Read
Peak Sequential Read Speed
523 MB/s +1% 517 MB/s -1%
Write
Peak Sequential Write Speed
494 MB/s Faster peak write speed.
+18%
417 MB/s -18%
4K Read
Peak 4K Random Read Speed
36.2 MB/s -31% 47.5 MB/s Much faster peak random read.
+31%
4K Write
Peak 4K Random Write Speed
117 MB/s Slightly faster peak random write.
+7%
109 MB/s -7%
Mixed
Peak Sequential Mixed IO Speed
508 MB/s Faster peak mixed IO speed.
+20%
422 MB/s -20%
4K Mixed
Peak 4K Random Mixed IO Speed
28.6 MB/s -69% 48.2 MB/s Much faster peak random mixed IO.
+69%
Market Share
Based on 4,121,346 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.4 % -2,185% 9.14 % Insanely higher market share.
+2,185%
Value
Value For Money
35.8 % -161% 93.5 % Hugely better value.
+161%
User Rating
UBM User Rating
64 % -89% 121 % Hugely more popular.
+89%
Price
Price (score)
$299 -67% $98 Much cheaper.
+67%
Age
Newest
60 Months -43% 34 Months Much more recent.
+43%
DQ Read
Peak 4K-64Thread Read Speed
374 MB/s -1% 379 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
321 MB/s Slightly faster peak deep queue write.
+13%
284 MB/s -13%
AS-SSD Total
AS-SSD Total Score
1,198 Pts +2% 1,171 Pts -2%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
88.4 MB/s -33% 118 MB/s Much faster peak deep queue mixed IO.
+33%
ADQ Read
Avg. 4K-64Thread Read Speed
190 MB/s -2% 193 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
184 MB/s -2% 188 MB/s +2%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
51.4 MB/s -28% 65.8 MB/s Faster deep queue mixed IO.
+28%
Capacity
Capacity
256GB 250GB
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 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) October 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 $300Nvidia GTX 1070 $394Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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