G1X SD Card Write Speed -- Photos

Started Feb 23, 2012 | Discussions thread
RJL65
Contributing MemberPosts: 519
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Re: G1X SD Card Write Speed -- Photos
In reply to RJL65, Feb 25, 2012

RJL65 wrote:

These results simply mean that the Canon G1x does not take any advantage whatsoever of any UHS SDHC or SDXC card. It also means that those "Class 4" Ultra IIs manufactured in early 2010 have a lower file-to-file latency (and therefore faster in multiple file transfers and sequential shooting) than most Class 6 and even some Class 10 cards. Sadly, the old Ultra II was replaced by an Ultra that's much slower in writes despite its "30 MB/s" speed claim and Class 6 rating.

In addition, I picked up an 8GB verion of the Extreme Pro 95 MB/s SDHC card in addition to the very latest Extreme (a 16GB 45 MB/s successor to the previous 30 MB/s card). The results in a USB 3.0 card reader so far is a bit disappointing for the 8GB 95 MB/s card: I could never achieve any faster than 56 MB/s out of that card in reads or 51 MB/s in writes. The Extreme (non-Pro) 45 MB/s card is much, much closer to its speed claim - 45 MB/s read and 41 MB/s write.

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