We tested the transfer speeds of the 3 SD cards using SiSoftware Sandra 2007’s Removable Storage benchmark. Besides testing using the SD interface, we also tested using the USB interface for the YouSD II cards to see if there was any difference between the two interfaces.
Bear in mind that this is a synthetic benchmark, and real-world performance will vary.
Intel Centrino Duo T2300
1GB 266Mhz DDR2 SDRAM (4-4-4-12)
Intel GMA 900
Built in card reader
The 512MB card is many times faster in the smaller file size range, but gradually drops to the same level of performance as the larger cards as the file size increases. This great jump in speed is not so important since most files transferred nowadays are much bigger.
The 1GB and 2GB cards perform almost identically, and it should also be noted that the USB interface seems to hold up better than the SD interface for larger file transfers. With the USB interface the highest read speed reached was 93x, recorded by the 2GB card in the 64MB files test, compared to the highest speed of 43x with the SD interface.
It could be possible that the card reader is bottlenecking the transfer speeds here, so take these results with a pinch of salt. After all, this is a synthetic benchmark.
Time for some water torture now…
We immersed the SD cards completely in water for half an hour to verify the manufacturer’s claims.
After that, we wiped the external surface of the SD cards dry (including the USB connector for the YouSD cards), and we immediately reconnected the SD cards.
At first, the 2GB card repeatedly gave a "USB Device Not Recognised" error, but after an hour or so it began working normally again. The other two cards worked without a hitch.
Despite the added waiting time for the 2GB card, I would still say that the manufacturer’s claims are completely valid.