OCZVTX4-25SAT3-256G
SanDiskSDSSDHII-240G-G25

Controller: Indilinx Everest 2 IDX400M00-BC. Flash Memory: Intel Synchronous 25nm MLC.

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

Real World Speed
Performance profile from 20,319 user samples
4,197 User Benchmarks
Best Bench: 105% 201GB free
Worst Bench: 64% 15GB free
Poor: 64% Great: 105%
SPEED RANK: 167th / 927
16,122 User Benchmarks
Best Bench: 83% 58GB free
Worst Bench: 47% 151GB free
Poor: 47% Great: 83%
SPEED RANK: 491st / 927
Effective Speed
Effective SSD Speed
86.7 % Much faster effective speed.
+33%
65.4 %
Read
Avg. Sequential Read Speed
456 MB/s 458 MB/s +0%
Write
Avg. Sequential Write Speed
401 MB/s Much faster write speed.
+59%
252 MB/s
4K Read
Avg. 4K Random Read Speed
26 MB/s 27.1 MB/s +4%
4K Write
Avg. 4K Random Write Speed
85.4 MB/s Much faster random write.
+72%
49.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed
387 MB/s Much faster mixed IO speed.
+57%
246 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
25.7 MB/s Much faster random mixed IO.
+75%
14.7 MB/s
Read
Peak Sequential Read Speed
497 MB/s 500 MB/s +1%
Write
Peak Sequential Write Speed
482 MB/s Much faster peak write speed.
+40%
344 MB/s
4K Read
Peak 4K Random Read Speed
33.2 MB/s 36.4 MB/s Slightly faster peak random read.
+10%
4K Write
Peak 4K Random Write Speed
124 MB/s Much faster peak random write.
+62%
76.7 MB/s
Mixed
Peak Sequential Mixed IO Speed
434 MB/s Much faster peak mixed IO speed.
+32%
329 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
36.5 MB/s Much faster peak random mixed IO.
+76%
20.7 MB/s
Market Share
Based on 6,774,655 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.07 % 0.45 % Hugely higher market share.
+543%
Value
Value For Money
30 % 79.6 % Hugely better value.
+166%
User Rating
UBM User Rating
61 % 65 % Slightly more popular.
+7%
Price
Price (score)
$400 $70 Hugely cheaper.
+83%
Age
Newest
73 Months 44 Months Much more recent.
+40%
DQ Read
Peak 4K-64Thread Read Speed
335 MB/s 349 MB/s +4%
DQ Write
Peak 4K-64Thread Write Speed
316 MB/s Much faster peak deep queue write.
+55%
204 MB/s
AS-SSD Total
AS-SSD Total Score
1,131 Pts Stronger server IO.
+16%
979 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
123 MB/s Hugely faster peak deep queue mixed IO.
+143%
50.7 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
189 MB/s Slightly faster deep queue read.
+11%
170 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
205 MB/s Much faster deep queue write.
+61%
127 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
75.7 MB/s Hugely faster deep queue mixed IO.
+149%
30.4 MB/s
Capacity
Capacity
256GB 240GB
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The Vertex 4 is just over a year old but thanks to its recent firmware update (1.5), it still manages to perform almost on a par with the best drives currently available. One of the striking aspects of the Vertex is its well-rounded performance profile. With an AS-SSD score of 1137 and a real world speed of 548 the Vertex 4 is able to cope extremely well with both server and consumer type workloads. This drive uses the new Indilux Everest 2 controller, which unlike the previous generations of this drive which used a SandForce controller, is able to cope admirably with both compressible and incompressible data. Overall, the Vertex 4 is a great performing SSD that said, there are better value for money (and younger) drives available, including the Vertex 4's own successor, the OCZ Vector[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]

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Solid State Drive Rankings (Price vs Performance) May 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 - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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
AMD Ryzen 5 1600 $169Nvidia GTX 1070 $447Samsung 850 Evo 250GB $100
Intel Core i7-8700K $325Nvidia GTX 1060-6GB $295Samsung 850 Evo 500GB $137
Intel Core i7-7700K $299AMD RX 480 $330Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $180SanDisk Extreme 64GB $41
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $960SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Extreme 16GB $20
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