UDMA and SanDisk Extreme IV

Started Sep 7, 2007 | Discussions
jeminijoseph Veteran Member • Posts: 6,616
UDMA and SanDisk Extreme IV

I haven't seen any reference if extreme IV cards are UDMA. Lexar 300X states that it's UDMA. Can someone tell me what're different UDMA cards? I want to buy a 8GB card and want to buy the fastest for future.

-- hide signature --

Thanks
Jemini Joseph

http://www.wildbirdimages.com

 jeminijoseph's gear list:jeminijoseph's gear list
Nikon D500
J O Regular Member • Posts: 401
Re: UDMA and SanDisk Extreme IV

if i read this link correctly, i think the sandisk 4 will work fine on udma devices.

http://www.robgalbraith.com/bins/content_page.asp?cid=7-7896-8475
--
http://oak.smugmug.com

OP jeminijoseph Veteran Member • Posts: 6,616
Does IV support write speed of D3?

Thanks for the link. I think it does. What do you think?
and D300 of course
--
Thanks
Jemini Joseph

http://www.wildbirdimages.com

 jeminijoseph's gear list:jeminijoseph's gear list
Nikon D500
clickshots Regular Member • Posts: 444
re:

i've ordered a few d3's and for those I've gotten some sandisk ducati cards. slightly faster than the extreme iv ones, should help the relatively small buffer clear quicker and get the files on the computer quicker

OP jeminijoseph Veteran Member • Posts: 6,616
So you think D3 and D300 will support it's speed?
-- hide signature --

Thanks
Jemini Joseph

http://www.wildbirdimages.com

 jeminijoseph's gear list:jeminijoseph's gear list
Nikon D500
Pradipta Dutta
Pradipta Dutta Veteran Member • Posts: 9,791
Yes, SanDisk Extreme IV uses UDMA for I/O

Any CF Card that can support I/O speed of more than 16.7 MB/s has to use UDMA. SanDisk Extreme IV uses UDMA Mode 3 to achieve I/O speed of 40 MB/s.

Here is a good article on UDMA -
http://www.pcguide.com/ref/hdd/if/ide/modesUDMA-c.html

-- hide signature --
 Pradipta Dutta's gear list:Pradipta Dutta's gear list
Nikon D800 Nikon D3 Nikon D2X Nikon D3200 Nikon AF-S Nikkor 24-70mm f/2.8G ED +5 more
OP jeminijoseph Veteran Member • Posts: 6,616
Thank you Pradipta

This helps. Now I can look for a good deal for IV. I don't like Lexar. I have one bad experience with Lexar and read many failures here dpreview. So Sandisk is my choice.

-- hide signature --

Thanks
Jemini Joseph

http://www.wildbirdimages.com

 jeminijoseph's gear list:jeminijoseph's gear list
Nikon D500
DKjos Regular Member • Posts: 266
According to Rob Galbraith...

in his review of the D3, the D3 is capable of 35MB/sec to UDMA cards. I'd like to know if the D3 can support this rate to 2 cards simultaneously in the instance where JPGs and NEFs are being split between 2 cards.

OP jeminijoseph Veteran Member • Posts: 6,616
Looks like..

.. D3 is a bomb :). may be it will. Don't think D300 can be compared to D3.
Good luck

-- hide signature --

Thanks
Jemini Joseph

http://www.wildbirdimages.com

 jeminijoseph's gear list:jeminijoseph's gear list
Nikon D500
DarkDTS Forum Member • Posts: 86
Re: Yes, SanDisk Extreme IV uses UDMA for I/O

It's funny the D3 can take advantage of the write speed of the Sandisk Extreme IV cards yet with the D300 you'd be lucky to better 10 MB/s. See here...

http://www.photoreview.com.au/tips/buying/buying-guide-memory-cards.aspx

Marianne Oelund Veteran Member • Posts: 7,788
Write speed example

jeminijoseph wrote:

I haven't seen any reference if extreme IV cards are UDMA. Lexar 300X
states that it's UDMA. Can someone tell me what're different UDMA
cards? I want to buy a 8GB card and want to buy the fastest for
future.

In preparation for an important recent shoot where I was planning to use RAW instead of JPEG files, I did a check of CF card write speed. I do not recall what size RAW files I was using, but this will still give you an idea of relative performance.

Measuring the time from the moment that the buffer fills, to the moment that it finishes emptying, I obtained 9.1 seconds for a Lexar 2GB 300x UDMA card, and 7.2 seconds for a Sandisk 2GB Extreme IV card. Thus the Sandisk writes noticeably faster on the D3.

I haven't measured upload (read) timings, but then that will depend quite a bit on your card reader and computer.

DarkDTS Forum Member • Posts: 86
Re: Write speed example

I just got my D300. Great camera. Impressive build quality and ergonomics. Just beginning to read the manuals and Quick Start booklet. But I am disappointed in the write speed. Just under 10 MB/s max.

With the Sony A700 it does on average 40 MB/s. But the D300 is a superior camera all things considered. No wonder it was voted Pop Photo's "Camera Of The Year". Hopefully Nikon will work on a fix. Maybe in the next firmware upgrade? Or is this an image processor issue....can't be....the A700 uses basically the same chip.

anotherMike Forum Pro • Posts: 10,154
Re: Write speed example

Hmm.

Shooting 14 bit lossless compressed NEF plus a medium fine Jpeg pair, I'm getting 11.18 mb/sec with Sandisk Extreme III cards and 17.53 mb/sec with Extreme IV cards.

Honestly - that's easily good enough for what I do, and I'm a guy who regularly ran up against the buffer wall with my D2X in the studio - I never have that problem with the D300. I shoot any faster, and I'll blow the breakers on the strobe packs (I occasionally shoot long bursts where I'm at 2 fps, and that heats up the packs pretty quick actually)

I could see someone like Marianne or a sport shooter might hit the wall, but man, with fast cards the D300 at least certainly covers most realistic uses better than any DSLR I've yet owned...

-m

DarkDTS Forum Member • Posts: 86
Re: Write speed example

I suppose in real world use the D300's write speeds are fine. As I said I think it's hard to find fault with the D300. Being able to take full advange of the write speeds offered by high-speed CF cards would be the icing. I'd assume Nikon is working on this knowing their competition (e.g. Sony A700 and Olympus E3) have managed.

Keyboard shortcuts:
FForum MMy threads