SamsungMZ-75E250B
OCZVTX4-25SAT3-256G

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

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

Real World Speed
Performance profile from 293,731 user samples
289,534 User Benchmarks
Best Bench: 113% 73GB free
Worst Bench: 70% 49GB free
Poor: 70% Great: 113%
SPEED RANK: 116th / 927
4,197 User Benchmarks
Best Bench: 105% 201GB free
Worst Bench: 64% 15GB free
Poor: 64% Great: 105%
SPEED RANK: 167th / 927
Effective Speed
Effective SSD Speed
94.6 % Slightly faster effective speed.
+9%
86.7 %
Read
Avg. Sequential Read Speed
499 MB/s Slightly faster read speed.
+9%
456 MB/s
Write
Avg. Sequential Write Speed
393 MB/s 401 MB/s +2%
4K Read
Avg. 4K Random Read Speed
37.6 MB/s Much faster random read.
+45%
26 MB/s
4K Write
Avg. 4K Random Write Speed
75.9 MB/s 85.4 MB/s Slightly faster random write.
+13%
Mixed
Avg. Sequential Mixed IO Speed
399 MB/s +3% 387 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
33.2 MB/s Faster random mixed IO.
+29%
25.7 MB/s
Read
Peak Sequential Read Speed
517 MB/s +4% 497 MB/s
Write
Peak Sequential Write Speed
416 MB/s 482 MB/s Faster peak write speed.
+16%
4K Read
Peak 4K Random Read Speed
46.2 MB/s Much faster peak random read.
+39%
33.2 MB/s
4K Write
Peak 4K Random Write Speed
101 MB/s 124 MB/s Faster peak random write.
+23%
Mixed
Peak Sequential Mixed IO Speed
422 MB/s 434 MB/s +3%
4K Mixed
Peak 4K Random Mixed IO Speed
47.4 MB/s Faster peak random mixed IO.
+30%
36.5 MB/s
Market Share
Based on 6,774,655 SSDs tested.
Market Share
Market Share (trailing 30 days)
6.39 % Insanely higher market share.
+9,029%
0.07 %
Value
Value For Money
90.9 % Hugely better value.
+203%
30 %
User Rating
UBM User Rating
128 % Hugely more popular.
+110%
61 %
Price
Price (score)
$100 Much cheaper.
+75%
$400
Age
Newest
41 Months Much more recent.
+44%
73 Months
DQ Read
Peak 4K-64Thread Read Speed
369 MB/s Slightly faster peak deep queue read.
+10%
335 MB/s
DQ Write
Peak 4K-64Thread Write Speed
278 MB/s 316 MB/s Slightly faster peak deep queue write.
+14%
AS-SSD Total
AS-SSD Total Score
1139 Pts +1% 1,131 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
119 MB/s 123 MB/s +3%
ADQ Read
Avg. 4K-64Thread Read Speed
197 MB/s +4% 189 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
181 MB/s 205 MB/s Slightly faster deep queue write.
+13%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
66.6 MB/s 75.7 MB/s Slightly faster deep queue mixed IO.
+14%
Capacity
Capacity
250GB 256GB
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The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '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) 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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