By chance I got a Toshiba U3 Speed ​​SD card - the one shown in the picture. For me who have been away from the SD card for N years, it is really rare. Because of the nature of camera enthusiasts, they have been using the same "Silver Card" series of Toshiba 64G 1000X CF cards - two high-speed cards with the same speed. So, the idea of ​​measuring what kind of experience the current SD card can reach is developed.
This review is based on the MAC OS platform and uses the retina macbookpro (2014mid 8G ram) for speed data testing.
In terms of test content, I focused on testing my usual reading and writing speeds and the application of camera continuous shooting.
This article will expand from the following sections: Unpacking, Data Reading, Camera Continuous Recording, Data Recovery Software.
One: out of the boxSD card packaging is very simple now, and the Toshiba N401 high-speed SD memory card is no exception. The card-type package is concise and clear, and the card body marked 95M/s is the maximum reading speed. On the packaging, the maximum write speed is indicated: 75M/s
On the back is some explanations, of which Japanese manufacturing may be favored by some users.
This time, in order to be decent, we had to give up the previous hand-wrapped packaging, and instead used scissors to cut it along the dotted line.
After you cut it, you can easily remove the SD card. In addition to transparent plastic fixation, we also saw a piece of paper.
LC Technology Data Recovery Software - Although no one wants to use it, it is still useful when it is really needed. Lost after the last glimmer of hope. (Specific how much will be used later)
Look out of the box to take a look at the protagonist of this time. Top to bottom information:
Up to 95M/s read speed, SDXC - Ui type - U3 speed - and at the same time meet the C10 speed standard
Card Series: EXCERIA PRO Series
On the back of the card, the main thing is to see MADE IN JAPAN.
Because you are not buying, stick a well-known Jingdong link.
Two: data read
This test platform is also introduced in front of
Test Platform: retina macbookpro (2014mid 8G ram version)
Reader: USB 3.0 multi-card reader. Make sure readers have no speed bottleneck.
Test Software: QuickBenchTM 4.0.7 for MACOS
Compare Products: Toshiba EXCERIA Series 1000X Speed ​​64G CF Card
The first test is everyone's curiosity. Can this card reach the nominal 95M on the card?
We set it as follows: use 50M file transfer (copy to memory card, copy it to computer hard disk SSD) 30 times, perform two rounds, and then get the maximum, minimum, average
Insert the card into the computer for the first time and take a look at the details
Haha, did not initialize show January 1, 1980.
OK, let's start testing. First of all, stick test results directly
SD card performance
CF card performance
It can be seen that the maximum and minimum fluctuations of the readings of the two cards are very small. The SD card of this test, based on our current settings, has an average reading speed of 88.6 M/s and an average writing speed. For 71.8 M/s, compared to the official reading of 95 M/s, there is a deviation of about 6% in writing the maximum speed of 75 M/s. And the maximum speed does not reach the nominal speed.
The CF card of this comparison test, based on our current round of settings, the average read speed is 147.7M/s, and the average write speed is 116.8M/s, compared to the official read 150M/s, writes 120M per second The maximum speed, very close, and the maximum speed reached the nominal value, like it ~
After testing the reading of larger files, let's take a look at the regular read-write test
SD card performance
CF card performance
As can be seen from the two charts, as a highly cost-effective SD card and CF card, both cards have a very good performance, the specific parameters we can see the chart, from left to right four-color columns represent the order Reading, sequential writing, random reading, random writing speed, horizontal axis is a single file size of R/W, for example, 4K random reading and writing performance that we often hear, is the leftmost performance in the table. All these small files can reach a speed of 10M/s+, and the performance can be imagined.
At the same time, we can clearly see that in the reading and writing of small files, the performance of the SD card is more balanced. The main reason is that the CF card has a very high reading performance when the latter file is slightly larger.
In general, this SD card in the theoretical test phase, its reading and writing performance can basically reach the official declared speed, random reading and writing of small files, but also has a good performance. The contrasting CF card shows more robust performance, which we discuss later.
Three: Toshiba ultimate speed N401 high-speed SD card VS Toshiba 1000X CF card experience Nikon D810 continuous shooting and high-definition videoThe paper has come to a final light, and it is important to know that this matter must be done. After all, the things that test software tests still stay on the numbers. Then, what is the actual performance of this SD card?
When I applied for a trial, I explained that I wanted to test the camera's continuous shooting test. It seems that people generally like to test 4k video shooting performance with a high-speed card. It's not the same here.
The test platform:
Camera: Nikon D810
Setting: High-speed continuous shooting, about 5 frames per second, set to uncompressed full-size RAW image format, single image size of about 70M, generating about 350M data per second.
Compare Products: Toshiba EXCERIA Series 1000X Speed ​​64G CF Card
Test mechanism: In order to make the memory card have enough data pressure, press the shutter continuously until the camera continuous shooting speed starts to slow down. The working mechanism of the camera is to write high-speed burst data into the camera body cache. When the buffer is full, the SD card starts to be written, and the continuous shooting speed is greatly reduced.
Test rule: start counting from the end of the continuous shooting of the camera until the writing is completed (the green indicator on the right side of the camera display can be seen when the writing is completed, and it means the writing is in progress), and it takes time to get the writing process. And calculate the total size of the file to get the speed of the card. The specific test process can be seen shooting video recording.
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