Crystal Disk Mark Benchmark Results
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ATTO Disk benchmark is a tool that measures the maximum read/write speed of any storage device. The tool produces a line per each test run where the size of the block is increased on each run. For this test, the block size varies from 512 byte (very small!) to 64MB (somewhat large). Generally, the speeds tend to peak out at around 512kb block size which is smaller than one MP3 song. So if your main interest is to store music/movie files, then larger block sizes should interest you. But if you intend to install apps on the card itself, then the seek time is more important than the transfer speed hence small block size gives you better indication on how it may perform in those conditions.
These tests allow overlapped I/O (multiple read/writes at the same time) at the depth of 4.
Here’s how the cards fared when ATTO tool has been used:
Samsung 128GB EVO microSDXC (UHS-1)
Patriot LX 128GB microSDXC (UHS-1)
Silicon Power microSDXC (UHS-1)
Samsung 128GB EVO+ microSDXC (UHS-1)
SanDisk Ultra 128GB microSDXC (UHS-1)
Lexar 633x 64GB microSDXC (UHS-1)
SanDisk Extreme 64GB microSDXC (UHS-3)
Comparison Chart
Here’s how the cards fared for reading speeds:
And the write speeds:
This test reveals that the Patriot LX microSDXC and the Silicon Power microSDXC performs about the same with a small edge going to the Silicon Power microSDXC for reading speeds. Samsung EVO microSDXC on the other hand, performs terrible on the read speed but slightly better than both on writes!
But the two new cards have outperformed the older ones by a significant margin. Samsung EVO+ microSDXC performed just about where I expected it to perform – outperform all other cards so far, in both reads and writes. But just look at the write performance of the SanDisk Ultra microSDXC! I had to run this test two more times to make sure the results were legit.
UPDATED on Aug 9, 2016
Well, looks like this comparison almost makes no sense now. I had to keep the original charts because the new chart makes some data almost unreadable due to ridiculously high numbers produced by the SanDisk Extreme microSDXC:
Not sure why ATTO reports such a lob-sided numbers for the SanDisk Extreme. I’ll need to dig deeper into how ATTO works and how UHS-3 cards are designed to figure this one out. But either way, it is sufficient to conclude that the SanDisk Extreme microSDXC is the new champ of this group.
Kent Beck is an American software engineer and the creator of extreme programming, a software development methodology that eschews rigid formal specifications for a collaborative and iterative design process. Wikipedia
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