Performance
The performance has been measured using popular benchmarks installed on a computer based on the Intel Core i7 4930K and the ASUS Rampage IV Extreme. The ports used for tests were connected to the Intel USB 3.0 controller.
ATTO Disk Benchmark
At the beginning we will take a quick look at the declared speeds and we know that the JumpDrive M20 should reach transfers up to 120MB/s read and 55MB/s write.
ATTO is showing us slightly different results than declared. The results achieved on our test rig were up to 145MB/s read and 45MB/s write. Read bandwidth is great. Actually every Lexar flash drive tested in our office could make a much higher read bandwidth than declared (JumpDrive M10 was even 80% faster than declared).
Write bandwidth is about 10MB/s lower than we can see in the specification but it also depends on the actual USB controller so maybe other controllers will perform better. I would not worry about it as the most important speed for daily work is read bandwidth.
CrystalDiskMark 3.0.3 x64
CrystalDiskMark is showing similar performance to ATTO. Here we can also check the random transfer speeds which are not the best but are still much higher than a regular mechanical HDD can make. The general performance in random operations seems good but definitely could be better.
Anvil’s Storage Utilities
Anvil’s tests are repeating the situation from the previous benchmarks. Once again we see higher than declared read bandwidth and lower writes. The performance is still high and should satisfy most users.
We have to remember that all those who are planning to use flash drives with mobile devices will be limited to about 40MB/s so it does not really matter if the flash drive can make a higher bandwidth when the mobile device will not be able to use it. Looking from the other side, it is good to have high bandwidth if we move files from our computer to the flash drive especially since the Lexar JumpDrive M20 tested in this review has a 32GB capacity so it will take some time to fill it up.
