OCZVTX4-25SAT3-256G
SamsungMZ-7KE256BW

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

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

Real World Speed
Performance profile from 47,197 user samples
4,197 User Benchmarks
Best Bench: 105% 201GB free
Worst Bench: 64% 15GB free
Poor: 64% Great: 105%
SPEED RANK: 167th / 927
43,000 User Benchmarks
Best Bench: 122% 157GB free
Worst Bench: 69% 86GB free
Poor: 69% Great: 122%
SPEED RANK: 112th / 927
Effective Speed
Effective SSD Speed
86.7 % 97.4 % Slightly faster effective speed.
+12%
Read
Avg. Sequential Read Speed
456 MB/s 503 MB/s Slightly faster read speed.
+10%
Write
Avg. Sequential Write Speed
401 MB/s 440 MB/s Slightly faster write speed.
+10%
4K Read
Avg. 4K Random Read Speed
26 MB/s 32.4 MB/s Faster random read.
+25%
4K Write
Avg. 4K Random Write Speed
85.4 MB/s 87 MB/s +2%
Mixed
Avg. Sequential Mixed IO Speed
387 MB/s 459 MB/s Faster mixed IO speed.
+19%
4K Mixed
Avg. 4K Random Mixed IO Speed
25.7 MB/s 33.1 MB/s Faster random mixed IO.
+29%
Read
Peak Sequential Read Speed
497 MB/s 529 MB/s Slightly faster peak read speed.
+6%
Write
Peak Sequential Write Speed
482 MB/s 503 MB/s +4%
4K Read
Peak 4K Random Read Speed
33.2 MB/s 43.6 MB/s Much faster peak random read.
+31%
4K Write
Peak 4K Random Write Speed
124 MB/s +2% 121 MB/s
Mixed
Peak Sequential Mixed IO Speed
434 MB/s 514 MB/s Faster peak mixed IO speed.
+18%
4K Mixed
Peak 4K Random Mixed IO Speed
36.5 MB/s 51 MB/s Much faster peak random mixed IO.
+40%
Market Share
Based on 6,774,655 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.07 % 0.83 % Insanely higher market share.
+1,086%
Value
Value For Money
30 % 66 % Hugely better value.
+120%
User Rating
UBM User Rating
61 % 98 % Much more popular.
+61%
Price
Price (score)
$400 $163 Much cheaper.
+59%
Age
Newest
73 Months 46 Months Much more recent.
+37%
DQ Read
Peak 4K-64Thread Read Speed
335 MB/s 375 MB/s Slightly faster peak deep queue read.
+12%
DQ Write
Peak 4K-64Thread Write Speed
316 MB/s 338 MB/s Slightly faster peak deep queue write.
+7%
AS-SSD Total
AS-SSD Total Score
1,131 Pts 1,237 Pts Slightly stronger server IO.
+9%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
123 MB/s 160 MB/s Much faster peak deep queue mixed IO.
+30%
ADQ Read
Avg. 4K-64Thread Read Speed
189 MB/s +5% 180 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
205 MB/s 210 MB/s +2%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
75.7 MB/s 80.5 MB/s Slightly faster deep queue mixed IO.
+6%
Capacity
Capacity
256GB 256GB
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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]

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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]

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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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