My requirements:
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- Fast read speed
- Writing speed for my application 2t rangig
- Capacity = min 2GB, 8GB better
Performing the measurement of literacy (and partially write) speed:
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I have used 2 data sets:
- 1 movie file 1GB size (here I expect top read speed)
- 1 folder with 33 files, which are 2-5MB in size; Total size of the folder: 100 MB (This record should correspond more to the practical use)
The SD card was filled to about 20-30% while performing measurements (About 1.1 to 2.3 GB)
Measuring results:
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iMac 2009 Dual Core 3.06GHz:
(SD port is connected internally via USB; no UHS)
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1GB movie file:
- Write to SD: 55sec -> 18 MB / sec
- SD read 52sec -> 19 MB / sec
Folder of files in Photo size (total: 100MB):
- Write to SD: 6sec -> 16 MB / sec
- Read from SD: 6sec -> 16 MB / sec
Netbook Samsung NC10 from 2009:
(SD port is connected internally via USB; no UHS)
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1GB movie file:
- Write to SD: 90sec -> 11 MB / sec
- SD read 62sec -> 16 MB / sec
Folder of files in Photo size (total: 100MB):
- Write to SD: 14sec -> 7 MB / sec
- Read from SD: 8sec -> 12 MB / sec
MacBook Pro 15 "
(Late 2011 i7 Quad 2.2 Ghz, with UHS)
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1GB movie file:
- Write to SD: 95sec -> 10 MB / sec
- SD read 23sec -> 43 MB / sec
Folder of files in Photo size (total: 100MB):
- Write to SD: 11sec -> 9 MB / sec
- Read from SD: 3 sec -> 33 MB / sec
MacBook Pro 13 "
(Late 2011 i5 Duo 2.4Ghz, with UHS)
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1GB movie file:
- SD Read 18 sec -> 55 MB / sec
Folder of files in Photo size (total: 100MB):
- Read from SD: 2 sec -> 50 MB / sec
Both MacBook Pro models I tested the merchants. When 13 inch model I have the write speed not measured because I did not want to try the patience of the friendly dealer. Please understand that I can not provide here writing results therefore - I think the other, existing figures have already a good indication.
Interpretation of the measurement results:
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Apparently, the read and write speed is highly dependent on the hardware used.
It is remarkable that the new, published a few weeks ago MacBook Pro 15 "although has a high read rate, but when writing only about half as fast as such as the 2-year-old iMac 27". Even a measurement of the dealer with a benchmark program yielded the same results.
It is also interesting that the degree of "small" MacBook Pro 13 "the fastest (tested by me) hardware - at least when reading.
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* Conclusion: *
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The fastest reading speed was measured: 55MByte / sec (on current hardware) and the fastest write speed was 18MB / sec (to 2 years old hardware).
This card is therefore apparently much faster than the (also very fast and still available) predecessor and currently costs only 5% more. (Link to the predecessor model: SanDisk Extreme Pro SDHC 8GB Class 10 Memory Card)
This performance is quite impressive, even if I personally had expected a little more. Anyway, this is the fastest card for my purpose, which is known to me.
my recommendation:
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It is very important:
The speed of the SD memory card is very much on the reader hardware used (PC, camera ...) dependent.
If you have older hardware, in which the SD Card Reader ...
a) is connected up yet internally via the USB bus
b) Although internally connected quickly, but not the new UHS (Ultra High Speed) protocol support
... Then you can not take advantage of the higher speed of this card.
Even if your hardware (whether PC or camera) is relatively new (eg, was produced from 2011), it has not necessarily the necessary technical requirements.
Inquire whether your hardware supports the SD card standard "UHS" (Ultra High Speed). This standard has only existed since the summer of 2010. Only then are speeds up to 104MB available / specified (UHS-I = 104MB / sec). Even hardware that was built well after the summer of 2010, often does not support this standard.
More speed with external SD card readers:
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For computers without super-fast SD card slot, I recommend the use of a current, fast, _externen_ SD card reader on a fast port on your computer (for example, FireWire 800, USB 3, PCMCIA (Express Card)).
These external readers often have a very high speed.
For example, should the reader "TS RDF1" Transcend TS-RDF1 Express card reader SDHC / SDXC UHS-1 come / to the memory card reviewed here at speeds in excess of 90MB / sec read and 80MB on / sec writing.
Surely you have hoped before reading this review, I could give unequivocal * recommendation for or against this product you a *. This can be in this case, but unfortunately did not make as a Empfehlbarkeit is highly dependent on the speed of memory card, which in turn in this case is highly dependent on your own hardware (PC and / or camera).
I hope nevertheless, my information can help you.
