SanDiskSDSSDHII-240G-G25
SamsungMZ-7PD256BW

Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC.

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

Real World Speed
Performance profile from 35,026 user samples
12,595 User Benchmarks
Best Bench: 82% 148GB free
Worst Bench: 46% 85GB free
Poor: 46% Great: 82%
SPEED RANK: 485th / 921
22,431 User Benchmarks
Best Bench: 105% 182GB free
Worst Bench: 56% 41GB free
Poor: 56% Great: 105%
SPEED RANK: 203rd / 921
Effective Speed
Effective SSD Speed
65.3 % 83 % Faster effective speed.
+27%
Read
Avg. Sequential Read Speed
459 MB/s 493 MB/s Slightly faster read speed.
+7%
Write
Avg. Sequential Write Speed
247 MB/s 362 MB/s Much faster write speed.
+47%
4K Read
Avg. 4K Random Read Speed
27.5 MB/s 28.2 MB/s +3%
4K Write
Avg. 4K Random Write Speed
50 MB/s 75.7 MB/s Much faster random write.
+51%
Mixed
Avg. Sequential Mixed IO Speed
245 MB/s 393 MB/s Much faster mixed IO speed.
+60%
4K Mixed
Avg. 4K Random Mixed IO Speed
14.7 MB/s 21.8 MB/s Much faster random mixed IO.
+48%
Read
Peak Sequential Read Speed
499 MB/s 523 MB/s +5%
Write
Peak Sequential Write Speed
343 MB/s 494 MB/s Much faster peak write speed.
+44%
4K Read
Peak 4K Random Read Speed
37.4 MB/s +4% 35.8 MB/s
4K Write
Peak 4K Random Write Speed
76.6 MB/s 111 MB/s Much faster peak random write.
+45%
Mixed
Peak Sequential Mixed IO Speed
328 MB/s 509 MB/s Much faster peak mixed IO speed.
+55%
4K Mixed
Peak 4K Random Mixed IO Speed
20.9 MB/s 28.4 MB/s Much faster peak random mixed IO.
+36%
Market Share
Based on 6,466,514 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.44 % Slightly higher market share.
+7%
0.41 %
Value
Value For Money
79.5 % Hugely better value.
+123%
35.6 %
User Rating
UBM User Rating
65 % +3% 63 %
Price
Price (score)
$70 Much cheaper.
+77%
$300
Age
Newest
43 Months Much more recent.
+35%
66 Months
DQ Read
Peak 4K-64Thread Read Speed
353 MB/s 365 MB/s +3%
DQ Write
Peak 4K-64Thread Write Speed
209 MB/s 317 MB/s Much faster peak deep queue write.
+52%
AS-SSD Total
AS-SSD Total Score
991 Pts 1,174 Pts Stronger server IO.
+18%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51 MB/s 89.7 MB/s Much faster peak deep queue mixed IO.
+76%
ADQ Read
Avg. 4K-64Thread Read Speed
169 MB/s 193 MB/s Slightly faster deep queue read.
+14%
ADQ Write
Avg. 4K-64Thread Write Speed
126 MB/s 184 MB/s Much faster deep queue write.
+46%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.3 MB/s 53.3 MB/s Much faster deep queue mixed IO.
+76%
Capacity
Capacity
240GB 256GB
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The Sandisk Ultra II sits above Sandisk's Ultra Plus and below their Extreme Pro. The Ultra Plus would probably have been phased out completely were it not for its continued success within budget space. The Ultra II is the first Sandisk drive to utilize cheaper (and slower) TLC NAND. Similarly to the Extreme Pro, the Ultra II utilizes an nCache which operates a portion of the NAND in simulated SLC mode. This strategy also matches the one employed by Samsung's now 14 months old Evo. Comparing the Ultra II and Evo shows broad performance equivalence which given the Ultra II's 15% price discount makes it the better choice today. That said it's probably worth waiting for the release of the 850 Evo which will pack another 14 months of Samsung's market leading R&D and will probably steal the show. [Sep '14 SSDrivePro]

MORE DETAILS

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

Solid State Drive Rankings (Price vs Performance) April 2018 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 - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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 i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $290Samsung 850 Evo 500GB $136
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $36Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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