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 26,964 user samples
10,792 User Benchmarks
Best Bench: 84% 140GB free
Worst Bench: 47% 19GB free
Poor: 47% Great: 84%
SPEED RANK: 412th / 859
16,172 User Benchmarks
Best Bench: 107% 24GB free
Worst Bench: 54% 132GB free
Poor: 54% Great: 107%
SPEED RANK: 146th / 859
Effective Speed
Effective SSD Speed
65.5 % -27% 83.1 % Faster effective speed.
+27%
Read
Avg. Sequential Read Speed
457 MB/s -7% 487 MB/s Slightly faster read speed.
+7%
Write
Avg. Sequential Write Speed
252 MB/s -41% 356 MB/s Much faster write speed.
+41%
4K Read
Avg. 4K Random Read Speed
27.5 MB/s -5% 28.8 MB/s +5%
4K Write
Avg. 4K Random Write Speed
51 MB/s -54% 78.4 MB/s Much faster random write.
+54%
Mixed
Avg. Sequential Mixed IO Speed
243 MB/s -60% 388 MB/s Much faster mixed IO speed.
+60%
4K Mixed
Avg. 4K Random Mixed IO Speed
14.1 MB/s -56% 22 MB/s Much faster random mixed IO.
+56%
Read
Peak Sequential Read Speed
499 MB/s -5% 524 MB/s Slightly faster peak read speed.
+5%
Write
Peak Sequential Write Speed
342 MB/s -44% 492 MB/s Much faster peak write speed.
+44%
4K Read
Peak 4K Random Read Speed
37.6 MB/s +3% 36.4 MB/s -3%
4K Write
Peak 4K Random Write Speed
80.5 MB/s -45% 117 MB/s Much faster peak random write.
+45%
Mixed
Peak Sequential Mixed IO Speed
328 MB/s -55% 508 MB/s Much faster peak mixed IO speed.
+55%
4K Mixed
Peak 4K Random Mixed IO Speed
20.9 MB/s -37% 28.6 MB/s Much faster peak random mixed IO.
+37%
Market Share
Based on 3,862,640 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.61 % -28% 0.78 % Higher market share.
+28%
Value
Value For Money
66 % Much better value.
+51%
43.8 % -51%
User Rating
UBM User Rating
63 % -2% 64 % +2%
Price
Price (score)
$90 Much cheaper.
+61%
$228 -61%
Age
Newest
36 Months Much more recent.
+39%
59 Months -39%
DQ Read
Peak 4K-64Thread Read Speed
353 MB/s -6% 373 MB/s Slightly faster peak deep queue read.
+6%
DQ Write
Peak 4K-64Thread Write Speed
208 MB/s -53% 318 MB/s Much faster peak deep queue write.
+53%
AS-SSD Total
AS-SSD Total Score
994 Pts -20% 1,194 Pts Stronger server IO.
+20%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.1 MB/s -74% 88.8 MB/s Much faster peak deep queue mixed IO.
+74%
ADQ Read
Avg. 4K-64Thread Read Speed
167 MB/s -16% 194 MB/s Faster deep queue read.
+16%
ADQ Write
Avg. 4K-64Thread Write Speed
130 MB/s -41% 183 MB/s Much faster deep queue write.
+41%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
29.4 MB/s -78% 52.2 MB/s Much faster deep queue mixed IO.
+78%
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) September 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 $295Nvidia GTX 1070 $410Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $270AMD RX 480 $350Samsung 850 Pro 256GB $120
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $263Samsung 850 Evo 500GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $724SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $155SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $56HyperX Fury DDR4 2133 C14 2x8GB $141SanDisk Extreme 16GB $20
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