Go Back   Steve's Digicams Forums > Digicam Help > Memory Cards, Microdrives, Card Readers

Reply
 
Thread Tools Search this Thread
Old Nov 4, 2005, 2:10 PM   #1
Junior Member
 
Join Date: Nov 2005
Posts: 3
Default

Hi all

I'd like to buy a 512MB xD card for my C-750UZ, but i'm a little bit confused by informations I find on the web :

Is the std xD faster than the new M-xD ?

The reviews of http://www.hjreggel.net/cardspeed/always test cards through readers (I want to use none, just want to plug my camera to my USB2port) and the official http://www.xd-picture.com/press/index.htmlsite states that newerones areslower* (r/w 4/2.5 MB/s) than std ones (r/w 5/3) at http://www.xd-picture.com/press/xdpc_techE.pdf



In a given environment (camera, computer port and load etc...) a same amount of pins on the card means same bus width, and same bus width + same clock + larger adressable memory space = slower data rate because of controler bottleneck (unless there is a huge ram buffer). Do I make any mistake?

*they say "comparable", which euphemism "rised my ears" ;-) see
http://www.xd-picture.com/press/index.htmlfebruary 15, 2005

and they never hilight new data rate compare to the elder (even to say it is at least the same), which means...

and they say "State-of-the-art MLC (Multi-Level Cell) technology for high-capacity memory" which means, I translate : "we did the best we could to increase the size, but..." or "MLC is best for size, but..."

what about SLC?


bibeu is offline   Reply With Quote
Sponsored Links
Old Nov 4, 2005, 2:17 PM   #2
Junior Member
 
Join Date: Nov 2005
Posts: 3
Default

:blah:Sorry: so the question was: which one should I choose to have the fastest !!!

HJReggel
hoped (history log page 2 sept.14th, 2005) toreviewof one of each S and M models 512MB. He could now do the same for cheapper since M-type range starts now at 256MB and both M & S should be FAT16 like 512MB.

I really hope to read this test asap.If anyone knows how to forward to him this info ...andmy hurry, it should be nice, because I want to buy at Crucial.com but they do not display any info about thegeneration of cards they sell (worse, they have a "confused about speed? ~don't care speed is not a true problem"!!!page). Even if I bye elsewhere, I'd like to bye the faster as my c750 accepts both up to 512MB.
bibeu is offline   Reply With Quote
Old Nov 23, 2005, 8:59 AM   #3
Junior Member
 
Join Date: Nov 2005
Posts: 4
Default

SLC = Single Layer Cell = Fast

MLC = Multi Layer Cell = Slow

But when it comes toXD it doesnt make a huge difference to dont be too worried.
Patsy999 is offline   Reply With Quote
Old Nov 23, 2005, 11:04 AM   #4
Junior Member
 
Join Date: Nov 2005
Posts: 3
Default

Some ideas went to my mind since I wrote here about xD S & M relative speed. I am not sure of what I said, because I learned that the memory controller is not in the stick. So, with the help of some high speed volatile RAM buffer amount, whatever xD could do what they are intended to do: storing data...delegating the fast acquisition to some device-embedded faster kind of volatile memory...this is an other story maybe, as I don't know if any digicam is built around this concept...maybe Hi-end ones, which could allow in a low weigth to shoot let say 10 snapshots at very high rate and higher resolution and TIFF, leaving the controller to transfer data in the background from the high speed volatile RAM to the xD storage...let the owners have confidence enough in their batteries...
bibeu is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 7:22 PM.