SamsungMZ-7PD256BW
SanDiskSDSSDHII-240G-G25

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

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

Real World Speed
Performance profile from 20,535 user samples
12,914 User Benchmarks
Best Bench: 107% 218GB free
Worst Bench: 56% 1GB free
Poor: 56% Great: 107%
SPEED RANK: 140th / 850
7,621 User Benchmarks
Best Bench: 84% 97GB free
Worst Bench: 47% 59GB free
Poor: 47% Great: 84%
SPEED RANK: 400th / 850
Effective Speed
Effective SSD Speed
83.4 % Faster effective speed.
+27%
65.7 % -27%
Read
Avg. Sequential Read Speed
490 MB/s Slightly faster read speed.
+8%
453 MB/s -8%
Write
Avg. Sequential Write Speed
352 MB/s Much faster write speed.
+44%
244 MB/s -44%
4K Read
Avg. 4K Random Read Speed
28.9 MB/s +3% 28.1 MB/s -3%
4K Write
Avg. 4K Random Write Speed
78.8 MB/s Much faster random write.
+50%
52.4 MB/s -50%
Mixed
Avg. Sequential Mixed IO Speed
383 MB/s Much faster mixed IO speed.
+62%
237 MB/s -62%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.3 MB/s Much faster random mixed IO.
+52%
14.7 MB/s -52%
Read
Peak Sequential Read Speed
524 MB/s Slightly faster peak read speed.
+5%
498 MB/s -5%
Write
Peak Sequential Write Speed
495 MB/s Much faster peak write speed.
+47%
336 MB/s -47%
4K Read
Peak 4K Random Read Speed
36.6 MB/s -3% 37.7 MB/s +3%
4K Write
Peak 4K Random Write Speed
118 MB/s Much faster peak random write.
+43%
82.4 MB/s -43%
Mixed
Peak Sequential Mixed IO Speed
508 MB/s Much faster peak mixed IO speed.
+58%
322 MB/s -58%
4K Mixed
Peak 4K Random Mixed IO Speed
29.3 MB/s Much faster peak random mixed IO.
+38%
21.2 MB/s -38%
Market Share
Based on 2,813,985 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.87 % Much higher market share.
+38%
0.63 % -38%
Value
Value For Money
44.5 % -49% 66.2 % Much better value.
+49%
User Rating
UBM User Rating
64 % 0% 64 % 0%
Price
Price (score)
$224 -60% $90 Much cheaper.
+60%
Age
Newest
55 Months -42% 32 Months Much more recent.
+42%
DQ Read
Peak 4K-64Thread Read Speed
375 MB/s Slightly faster peak deep queue read.
+7%
349 MB/s -7%
DQ Write
Peak 4K-64Thread Write Speed
322 MB/s Much faster peak deep queue write.
+54%
209 MB/s -54%
AS-SSD Total
AS-SSD Total Score
1,202 Pts Stronger server IO.
+21%
990 Pts -21%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
90.7 MB/s Much faster peak deep queue mixed IO.
+76%
51.5 MB/s -76%
ADQ Read
Avg. 4K-64Thread Read Speed
194 MB/s Slightly faster deep queue read.
+13%
172 MB/s -13%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s Much faster deep queue write.
+42%
132 MB/s -42%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
53.2 MB/s Much faster deep queue mixed IO.
+77%
30.1 MB/s -77%
Capacity
Capacity
256GB 240GB
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 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

Solid State Drive Rankings (Price vs Performance) May 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 $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $300AMD RX 480 $210Samsung 850 Pro 256GB $138
Intel Core i5-7600K $240Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $167
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $13
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