With the popularity of digital products, there are more and more memory card products into our lives. There are SD card, CF card, TF card, MiniSD card, MS card, XD card and so on? And among them, I am afraid that the most compact is the TF card. Therefore, TF card is also widely used in cell phones and other relatively compact space on the micro digital products.
Daily life is inseparable from the microSD card
microSD was originally called TransFlash card, referred to as TF card, which is the first standard established by SanDisk (Sunglasses) in 2004, and was not officially added to the SD specification until 2005 by the SDA and renamed microSD, so we often see microSD cards produced by Sandisk. MicroSD cards produced by Sandisk have the TF name printed on the packaging.
Sandisk's products still have TransFlash written on them
Now, it's not just Sandisk that's producing microSD cards, it's almost all of the major memory card manufacturers on the market. Don't look at microSD's small size, but now it has achieved 16GB or even larger capacity, and through the SDHC adapter, we can also easily enjoy more than 4GB of massive storage on cell phones and other ultra-small digital devices.
But we always have a lot of questions about microSD cards, such as how fast are they? How big is the gap between different brands, does microSDHC provide performance improvement, and does SD card sleeve have any effect on the speed? With these doubts, we tested Sheng Disk Sandisk, Kingston, ADATA, Apacer, four common microSD card products on the market, the capacity from 4GB - 16GB.
"Participating microSDHC card at a glance
"Sheng Disk 8GB microSDHC card
"ADATA 4GB microSDHC card
"Kingston 8GB microSDHC card
"Kingston 16GB microSDHC card
"
Apacer 8GB microSDHC card
In order to stay close to the most practical applications, we used a very computer and used the most common Brio SSK all-in-one card reader on the market today.
"The test software is as follows:
ATTO Disk Benchmark
HD Tune
Fastcopy
"The test results are as follows:
"ATTO Disk Benchmark results
"Sungrown Disk 8GB microSDHC
"ADATA 4GB microSDHC
" Kingston 8GB microSDHC
" Kingston 16GB microSDHC
"Apacer 8GB microSDHC
From the above results, we can see that all microSDHC read speeds can reach around 20MB/s, but the write speeds of most microSDHCs are less than stellar. One of the highest write speeds is the Sheng Disk microSDHC, with a write speed of nearly 17MB, and it's not too far off from the read speed.
In contrast, Kingston, Apacer, and ADATA cards, the difference between write and read speeds is much greater, though Kingston's 8GB card is significantly better than the 16GB, with write speeds above 10MB.
For more information on the read/write speeds of SD card Class levels, see: /2009/0304/20090304031801.shtml
"HD Tune test results
"Sunglasses 8GB microSDHC
"ADATA 4GB microSDHC
< p>"Kingston 8GB microSDHC"Kingston 16GB microSDHC
"Apacer 8GB microSDHC
HD Tune's Benchmark Read Test tests the read stability of a memory. Here we can see that Kingston and Sungrow's curves are both relatively flat, while ADATA's burst transfer rate alone reaches 14MB/s. In terms of average read speeds, there's very little difference between all the products.
"Real-world access test
In order to better match the real-world application, we selected 6 video files with a total capacity of 1.16GB, and timed the copy-in and copy-out operations with FastCopy.
"Sungrow microSDHC read time (copy to hard disk)
"Write time (copy to memory card)
"ADATA microSDHC read time (copy to hard disk)
"Write time (copy to memory card)
"Kingston 8GB microSDHC read time ( Copy to Hard Disk)
"Write Time (Copy to Memory Card)
"Kingston 16GB microSDHC Read Time (Copy to Hard Disk)
"Write Time (Copy to Memory Card)
"Apacer microSDHC Read Time (Copy to Hard Disk)
"Write Time (Copy to Memory Card) )
In this test, Sungrow once again showed great strength, both read and write speeds were at the top of the list, followed closely by the Kingston 8GB card. Here we can actually feel the huge difference in write speeds, with Sungrow taking only 80 seconds to complete a 1.16GB file write, compared to 197 seconds for Apacer.
"Tests on whether the card sleeve affects the card speed
There are some voices on the Internet that believe that the SD card sleeve contains the conversion circuitry that corresponds to the microSD, and therefore the goodness of the card sleeve also affects the actual speed of the microSD, but is this the case?
We split the Sungrow microSD card with the best test results, and inserted the microSD card part of it into other brands' card sleeves to test read/write speeds, as well as inserting other brands' microSD cards into Sungrow's sleeves to test read/write speeds, and see what the difference is.
This time, we'll just repeat the last Fastcopy write test, and the results are as follows:
"microSD card
"Card holder
"Write speed (sec)
ChengDisk
Original
80.69
ChengDisk
Advantage
80.28
Sungrow
Apacer
80.27
Sungrow
Kingston
80.28
Admantec
original
148.52
Admantec
Sungrow
149.70
Apacer
Original
197.86
Apacer
Sungrow
188.19
Kingston 8GB
Original
108.11
Kingston 8GB
Sungrow
Sungrow
This is the first time I've ever seen an Apacer device with a USB 2.0 port. p>108.45
From the data in the table above, we can see that the difference in test results is almost negligible, no matter what brand of card holder is used for microSD. Therefore, we can conclude that microSD card sleeves have no impact on microSD card performance.
"Review Summary: Through this test, we have learned how fast microSDHC has reached. We also learned that there are significant differences between different brands and capacities of microSD cards, mainly in terms of write speeds. In addition, we know from actual data that the card holder is just a bridge and does not affect the read/write speed of the card itself.