SamsungMZ-7KE256BW
OCZVTX4-25SAT3-256G

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

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

Real World Speed
Performance profile from 42,022 user samples
38,113 User Benchmarks
Best Bench: 122% 107GB free
Worst Bench: 69% 12GB free
Poor: 69% Great: 122%
SPEED RANK: 72nd / 885
3,909 User Benchmarks
Best Bench: 104% 177GB free
Worst Bench: 60% 0GB free
Poor: 60% Great: 104%
SPEED RANK: 151st / 885
Effective Speed
Effective SSD Speed
99.2 % Faster effective speed.
+17%
84.9 %
Read
Avg. Sequential Read Speed
500 MB/s Slightly faster read speed.
+11%
451 MB/s
Write
Avg. Sequential Write Speed
445 MB/s Slightly faster write speed.
+12%
396 MB/s
4K Read
Avg. 4K Random Read Speed
32.5 MB/s Faster random read.
+26%
25.7 MB/s
4K Write
Avg. 4K Random Write Speed
87.5 MB/s +4% 83.9 MB/s
Mixed
Avg. Sequential Mixed IO Speed
462 MB/s Faster mixed IO speed.
+21%
383 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
34.9 MB/s Much faster random mixed IO.
+42%
24.6 MB/s
Read
Peak Sequential Read Speed
528 MB/s Slightly faster peak read speed.
+6%
497 MB/s
Write
Peak Sequential Write Speed
502 MB/s +5% 480 MB/s
4K Read
Peak 4K Random Read Speed
44 MB/s Much faster peak random read.
+32%
33.4 MB/s
4K Write
Peak 4K Random Write Speed
124 MB/s 128 MB/s +3%
Mixed
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
+18%
435 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
51.5 MB/s Much faster peak random mixed IO.
+48%
34.7 MB/s
Market Share
Based on 5,667,951 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.01 % Hugely higher market share.
+910%
0.1 %
Value
Value For Money
82 % Hugely better value.
+179%
29.3 %
User Rating
UBM User Rating
99 % Much more popular.
+62%
61 %
Price
Price (score)
$125 Much cheaper.
+69%
$400
Age
Newest
43 Months Much more recent.
+39%
70 Months
DQ Read
Peak 4K-64Thread Read Speed
376 MB/s Slightly faster peak deep queue read.
+13%
334 MB/s
DQ Write
Peak 4K-64Thread Write Speed
339 MB/s Slightly faster peak deep queue write.
+8%
315 MB/s
AS-SSD Total
AS-SSD Total Score
1,243 Pts Slightly stronger server IO.
+10%
1,132 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
164 MB/s Much faster peak deep queue mixed IO.
+34%
122 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
201 MB/s Faster deep queue read.
+16%
174 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
217 MB/s Slightly faster deep queue write.
+8%
200 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
93.2 MB/s Much faster deep queue mixed IO.
+31%
70.9 MB/s
Capacity
Capacity
256GB 256GB
ADVERTISEMENT

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

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

Solid State Drive Rankings (Price vs Performance) February 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]

ADVERTISEMENT

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
Intel Core i7-8700K $330Nvidia GTX 1070 $430Samsung 850 Evo 250GB $88
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $149
AMD Ryzen 5 1600 $170AMD RX 480 $400Samsung 850 Pro 256GB $125
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $185SanDisk Extreme 64GB $50
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $975SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $206SanDisk Extreme 16GB $18
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback