Berkeley CSUA MOTD:Entry 29137
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2025/05/25 [General] UID:1000 Activity:popular
5/25    

2003/7/25-26 [Computer/HW/Memory, Computer/HW/Drives] UID:29137 Activity:moderate
7/25    On a related note, what's a fast CompactFlash brand?  Or are they
        all about the same speed?  Thanks.
        \_ The new Lexars have pretty fast write times.
        \_ Vikings.
        \_ http://www.dpreview.com/articles/mediacompare
           \_ Thanks!
           \_ According to the forums on that site, a lot of people love
              Transcend for their speed and reliability. I have their 1GB
              model, and it's worked like a charm.
2025/05/25 [General] UID:1000 Activity:popular
5/25    

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Cache (3250 bytes)
www.dpreview.com/articles/mediacompare -> www.dpreview.com/articles/mediacompare/
However, there has never been a single definitive reference point for such information. This article is designed to be a permanent database of the performance of various brands, types and capacities of card. Note that since this article was first published it has expanded and been split over four separate pages. The misleading MB There has been a lot of talk recently about misleading marketing in the flash media storage market. The truth of the matter is that hard disk manufacturers have been using this system of units now for many years. Indeed 1 MB = 1,000,000 bytes (as defined in 21 SI standards), but after we've formatted our cards and look at them in Windows (which defines a MB in the memory sense as 1,048,576 bytes) we see a smaller number than is printed on the label. A MB in this sense should actually be called a mebibyte. This confusion should be addressed more clearly by the manufacturers. Clearly for these smaller capacity devices it makes more of a difference. Lexar recently released their new 16x flash media, in that press release they clearly stated that an 'x' = 150 KB/sec. This means that the Lexar Pro 16x card should be capable of 2,400 KB/sec, and that the Pro 12x card (tested below) should be capable of 1,800 KB/sec. Unfortunately what they don't state is how they come to this figure, whether it is read or write speed and in what device the tests were performed. Until manufacturers come up with an independently verifiable standard test for transfer speed the only reference we have are our own tests (below). As you'll see there's a big difference in performance depending on the device driving the card, don't buy a 12x card for your Nikon Coolpix 995 and expect to get 1,800 KB/sec, you won't. Compact Flash: Images Below you can see a representative image of each card in our test database, as and when we have the opportunity to we will update this database with new cards. Card manufacturers who wish to have their card added to this database should 22 contact me. The Computer MiB capacity (1 MiB = 1048576 bytes) measured by simply formatting the card and reading exactly how many bytes are available for storage. Brand / Name Type Year Label capacity Computer MiB capacity Street Price $/MB Added 23 Pretec 3 GB Type II 2002 3 GB 2945 MiB $ ? Compact Flash: IEEE 1394 Card Reader performance An IEEE 1394 (Firewire) card reader is just about the single fastest device there is for reading / writing CF cards. It allows us to see the absolute maximum performance of the Compact Flash card. Speeds shown below are a more accurate representation of the actually capability of the card, although many digital cameras are not capable of reading / writing at these speeds (excluding some D-SLR's). Removable device write caching was disabled to provide more accurate results. You may choose to sort these results by: 46 Capacity, 47 Write performance, 48 Read performance. In this respect the Ridata, Kingston, all Viking and Microtech cards all put in performances of 4 MB/sec or greater (which is seriously fast). It's clear this is a great test for a cards maximum possible throughput, none of the transfer speeds measured through the Firewire reader were beaten by our camera tests (next three pages).