On 11-02-08 10:22 AM, AlunFoto wrote:
2011/2/8 Bruce Walker<[email protected]>:
- WiFi is much, *much* speedier than USB
Are you sure, Bruce?
The card is specified to utilise the 802.11n WiFi standard, which
according to Wikipedia will give 100 Mbit/s. AFAIK, the USB2 supports
480 Mbit/s.
Jostein
The wires support 480Mbps, yes, but once you load up the entire USB
driver stack the resulting actual in-use speed is much less than that.
Have you ever timed USB2 xfers? One word for them: abysmal. Compare
copying raw image files via USB2 to a disk versus, eg, over Firewire 400
to the same disk. After having tried it, I would never again use an
external USB2 drive for attached storage. It's ok for doing backups
over, but it is completely out of the league of eSATA and Firewire.
True, my estimation of the achievable WiFi speed is based on my own use
of it around the house, but also from seeing a video demonstration of a
645D user xferring raw shots to LR via that card. This photog was
sending full raw 645D shots to Lightroom in about 5 seconds or less. It
takes a second or two for each of my much smaller K20D shots to copy
from the SDHC card to the iMac through a USB2 card reader.
645D Eye-Fi tethering demo ...
http://www.youtube.com/watch?v=wY6GdxDyP1w
-bmw
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