SanDiskSDSSDHII-240G-G25
SamsungMZ-7KE256BW

Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC. Release date: Q3 2014.

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

Real World Speed
Performance profile from 86,449 user samples
24,867 User Benchmarks
Best Bench: 102% 223GB free
Worst Bench: 60% 18GB free
Poor: 60% Great: 102%
SPEED RANK: 351st / 1000
61,582 User Benchmarks
Best Bench: 126% 133GB free
Worst Bench: 72% 164GB free (System drive)
Poor: 72% Great: 126%
SPEED RANK: 176th / 1000
Effective Speed
Effective SSD Speed
83.1 % 105 % Faster effective speed.
+26%
Read
Avg. Sequential Read Speed
450 MB/s 474 MB/s Slightly faster read speed.
+5%
Write
Avg. Sequential Write Speed
373 MB/s 422 MB/s Slightly faster write speed.
+13%
4K Read
Avg. 4K Random Read Speed
29.7 MB/s 34 MB/s Slightly faster random read.
+14%
4K Write
Avg. 4K Random Write Speed
79 MB/s 95.1 MB/s Faster random write.
+20%
Mixed
Avg. Sequential Mixed IO Speed
255 MB/s 342 MB/s Much faster mixed IO speed.
+34%
4K Mixed
Avg. 4K Random Mixed IO Speed
36.9 MB/s 44.9 MB/s Faster random mixed IO.
+22%
SusWrite
Avg. Sustained Write Speed
181 MB/s 365 MB/s Hugely faster sustained write speed.
+102%
Read
Peak Sequential Read Speed
503 MB/s 515 MB/s +2%
Write
Peak Sequential Write Speed
468 MB/s 491 MB/s +5%
4K Read
Peak 4K Random Read Speed
39.2 MB/s 44.4 MB/s Slightly faster peak random read.
+13%
4K Write
Peak 4K Random Write Speed
120 MB/s 130 MB/s Slightly faster peak random write.
+8%
Mixed
Peak Sequential Mixed IO Speed
338 MB/s 384 MB/s Slightly faster peak mixed IO speed.
+14%
4K Mixed
Peak 4K Random Mixed IO Speed
49.6 MB/s 59.2 MB/s Faster peak random mixed IO.
+19%
SusWrite
Peak Sequential Sustained Write 60s Average
251 MB/s 486 MB/s Hugely faster peak sustained write speed.
+94%
Market Share
Based on 14,374,440 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.23 % 0.41 % Much higher market share.
+78%
Value
Value For Money
101 % Much better value.
+42%
71.2 %
User Rating
UBM User Rating
63 % 99 % Much more popular.
+57%
Price
Price (score)
$70 Much cheaper.
+57%
$163
Age
Newest
56 Months +3% 58 Months
DQ Read
Peak 4K-64Thread Read Speed
390 MB/s +1% 388 MB/s
DQ Write
Peak 4K-64Thread Write Speed
309 MB/s 358 MB/s Faster peak deep queue write.
+16%
AS-SSD Total
AS-SSD Total Score
1,213 Pts 1,284 Pts Slightly stronger server IO.
+6%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
254 MB/s 357 MB/s Much faster peak deep queue mixed IO.
+41%
ADQ Read
Avg. 4K-64Thread Read Speed
324 MB/s 345 MB/s Slightly faster deep queue read.
+6%
ADQ Write
Avg. 4K-64Thread Write Speed
250 MB/s 304 MB/s Faster deep queue write.
+22%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
208 MB/s 304 MB/s Much faster deep queue mixed IO.
+46%
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 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) May 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 $356Nvidia GTX 1070 $314Samsung 850 Evo 250GB $92
AMD Ryzen 5 2600 $145Nvidia GTX 1060-6GB $208Samsung 850 Evo 500GB $99
AMD Ryzen 5 1600 $108Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $90SanDisk Extreme 64GB $128
WD Blue 1TB (2012) $40G.SKILL Trident Z DDR4 3200 C14 4x16GB $651SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $73Corsair Vengeance LPX DDR4 3200 C16 2x8GB $85SanDisk Ultra Fit 32GB $12
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