Test results for writes to various Compact Flash cards.
Wide variation.
Some details re brand inside card.


http://www.hypercamera.org/Memoires%20et%20lecteurs/Performances%20Cartes%20transcend/Comparatif.htm

Links from this page ALL seem broken but info here is useful.


Google: Wanted to see how my CF cards should perform.
_____________________________________________

I have discovered that all CF can very much be not equal. I have a 356 MB
and a 512 MB from the same manufacturer and nominally identical in
performance. The larger card takes 60% to 70% longer to write data to the
card in the same camera.

Opinions as to why vary. What should have been a highly competent official
source said the problem was probably due to the card being a 5V card whereas
the proper part was their 3V3 version. What should have been an even more
competent source (actual supplier stage 2 tech in US) said that was all
rubbish and cards were same voltage - the 2nd card used a faster technology.
Alas the second man appears correct.

The 512 MB card MAY be faulty. The camera may have an obscure inconsistency.
The... ?

                                                                    256 MB
512 MB

Write ~14 MB RAW picture file                    7 to 8s            14s
Write full 64 MB camera internal buffer           76s              126 s

Spec is 2.8 MB/s
Neither comes close to this spec.

As the long term shooting rate depends on the writing time, such a
difference in cards which are nominally identical in spec is quite
unacceptable


        RM

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.