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 61,567 user samples
15,246 User Benchmarks
Best Bench: 101% 223GB free
Worst Bench: 57% 71GB free (System drive)
Poor: 57% Great: 101%
SPEED RANK: 299th / 956
46,321 User Benchmarks
Best Bench: 126% 132GB free
Worst Bench: 78% 107GB free (System drive)
Poor: 78% Great: 126%
SPEED RANK: 141st / 956
Effective Speed
Effective SSD Speed
82 % 105 % Faster effective speed.
+29%
Read
Avg. Sequential Read Speed
449 MB/s 475 MB/s Slightly faster read speed.
+6%
Write
Avg. Sequential Write Speed
361 MB/s 417 MB/s Faster write speed.
+16%
4K Read
Avg. 4K Random Read Speed
29.5 MB/s 34.1 MB/s Faster random read.
+16%
4K Write
Avg. 4K Random Write Speed
78.6 MB/s 97 MB/s Faster random write.
+23%
Mixed
Avg. Sequential Mixed IO Speed
246 MB/s 340 MB/s Much faster mixed IO speed.
+38%
4K Mixed
Avg. 4K Random Mixed IO Speed
36.2 MB/s 45.3 MB/s Faster random mixed IO.
+25%
SusWrite
Avg. Sustained Write Speed
176 MB/s 364 MB/s Hugely faster sustained write speed.
+107%
Read
Peak Sequential Read Speed
500 MB/s 517 MB/s +3%
Write
Peak Sequential Write Speed
472 MB/s 490 MB/s +4%
4K Read
Peak 4K Random Read Speed
38.8 MB/s 44.5 MB/s Slightly faster peak random read.
+15%
4K Write
Peak 4K Random Write Speed
121 MB/s 130 MB/s Slightly faster peak random write.
+7%
Mixed
Peak Sequential Mixed IO Speed
340 MB/s 382 MB/s Slightly faster peak mixed IO speed.
+12%
4K Mixed
Peak 4K Random Mixed IO Speed
48.7 MB/s 58.5 MB/s Faster peak random mixed IO.
+20%
SusWrite
Peak Sequential Sustained Write 60s Average
234 MB/s 480 MB/s Hugely faster peak sustained write speed.
+105%
Market Share
Based on 8,555,634 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.32 % 0.64 % Hugely higher market share.
+100%
Value
Value For Money
99.8 % Better value.
+21%
82.6 %
User Rating
UBM User Rating
64 % 95 % Much more popular.
+48%
Price
Price (score)
$70 Much cheaper.
+48%
$134
Age
Newest
48 Months +4% 50 Months
DQ Read
Peak 4K-64Thread Read Speed
390 MB/s +1% 388 MB/s
DQ Write
Peak 4K-64Thread Write Speed
310 MB/s 354 MB/s Slightly faster peak deep queue write.
+14%
AS-SSD Total
AS-SSD Total Score
1,214 Pts 1,280 Pts Slightly stronger server IO.
+5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
254 MB/s 358 MB/s Much faster peak deep queue mixed IO.
+41%
ADQ Read
Avg. 4K-64Thread Read Speed
316 MB/s 344 MB/s Slightly faster deep queue read.
+9%
ADQ Write
Avg. 4K-64Thread Write Speed
243 MB/s 305 MB/s Faster deep queue write.
+26%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
200 MB/s 303 MB/s Much faster deep queue mixed IO.
+52%
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) September 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 - 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 $370Nvidia GTX 1070 $344Samsung 850 Evo 250GB $85
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $110
Intel Core i5-8600K $245AMD RX 480 $280Samsung 850 Pro 256GB $134
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $150SanDisk Extreme 64GB $80
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $899SanDisk Extreme 32GB $30
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3200 C16 2x8GB $160SanDisk Ultra Fit 32GB $11
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