SanDiskSDSSDHII-240G-G25
SamsungMZ-7KE256BW

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

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND

Real World Speed
Performance profile from 33,221 user samples
8,464 User Benchmarks
Best Bench: 84% 122GB free
Worst Bench: 47% 44GB free
Poor: 47% Great: 84%
SPEED RANK: 409th / 857
24,757 User Benchmarks
Best Bench: 123% 172GB free
Worst Bench: 70% 165GB free
Poor: 70% Great: 123%
SPEED RANK: 58th / 857
Effective Speed
Effective SSD Speed
65.7 % -52% 100 % Much faster effective speed.
+52%
Read
Avg. Sequential Read Speed
457 MB/s -10% 504 MB/s Slightly faster read speed.
+10%
Write
Avg. Sequential Write Speed
245 MB/s -81% 443 MB/s Hugely faster write speed.
+81%
4K Read
Avg. 4K Random Read Speed
28 MB/s -19% 33.4 MB/s Faster random read.
+19%
4K Write
Avg. 4K Random Write Speed
51.4 MB/s -76% 90.7 MB/s Much faster random write.
+76%
Mixed
Avg. Sequential Mixed IO Speed
241 MB/s -92% 462 MB/s Hugely faster mixed IO speed.
+92%
4K Mixed
Avg. 4K Random Mixed IO Speed
14.5 MB/s -137% 34.4 MB/s Hugely faster random mixed IO.
+137%
Read
Peak Sequential Read Speed
498 MB/s -6% 529 MB/s Slightly faster peak read speed.
+6%
Write
Peak Sequential Write Speed
339 MB/s -48% 503 MB/s Much faster peak write speed.
+48%
4K Read
Peak 4K Random Read Speed
38.1 MB/s -13% 43.1 MB/s Slightly faster peak random read.
+13%
4K Write
Peak 4K Random Write Speed
82.6 MB/s -59% 131 MB/s Much faster peak random write.
+59%
Mixed
Peak Sequential Mixed IO Speed
324 MB/s -59% 514 MB/s Much faster peak mixed IO speed.
+59%
4K Mixed
Peak 4K Random Mixed IO Speed
21.2 MB/s -138% 50.5 MB/s Hugely faster peak random mixed IO.
+138%
Market Share
Based on 3,531,581 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.67 % -112% 1.42 % Hugely higher market share.
+112%
Value
Value For Money
69.2 % -19% 82.2 % Better value.
+19%
User Rating
UBM User Rating
63 % -52% 96 % Much more popular.
+52%
Price
Price (score)
$85 Much cheaper.
+33%
$126 -33%
Age
Newest
35 Months Slightly more recent.
+5%
37 Months -5%
DQ Read
Peak 4K-64Thread Read Speed
359 MB/s -6% 381 MB/s Slightly faster peak deep queue read.
+6%
DQ Write
Peak 4K-64Thread Write Speed
209 MB/s -64% 343 MB/s Much faster peak deep queue write.
+64%
AS-SSD Total
AS-SSD Total Score
1,007 Pts -25% 1,260 Pts Stronger server IO.
+25%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
50.9 MB/s -224% 165 MB/s Hugely faster peak deep queue mixed IO.
+224%
ADQ Read
Avg. 4K-64Thread Read Speed
177 MB/s -18% 209 MB/s Faster deep queue read.
+18%
ADQ Write
Avg. 4K-64Thread Write Speed
131 MB/s -69% 222 MB/s Much faster deep queue write.
+69%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
29.9 MB/s -196% 88.4 MB/s Hugely faster deep queue mixed IO.
+196%
Capacity
Capacity
240GB 256GB
ADVERTISEMENT

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) August 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 $298Nvidia GTX 1070 $410Samsung 850 Evo 250GB $100
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $126
Intel Core i5-7600K $212Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $168
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $718SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $57HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback