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| p.2 #3 · CF card speed test "updated" |
Lars where did you source the Transcend 400x UDMA 7 cards? BH shows images of the Transcend with UDMA written on it and not UDMA 7. They are also described as being UDMA 6 cards. On Transcend's site the 64GB 400x UDMA and UDMA 7 cards share the same part number.
Are you planning to get Lexar 64GB memory cards at 800x and 1000x speeds? Based on your results of the UDMA 7 400x cards it is safe to assume that Transcend 600x and 1000x UDMA7 cards will have nearly the same number of shots for a 30 sec burst.
Amazon have the 64GB 400x UDMA 7 cards at these prices
60MB/s read & 45MB/s write Lexar $99.59
90MB/s read & 60MB/s write Transcend $103.98
With a 128GB UDMA7 card you can have these many RAWs & L JPEGs. These figures were based on what was written in each body's manual.
1D X & C - 19,200
1D4 - 22,144
5D3 - 16,160
5D2 - 19,840
7D - 18,976
1D X & C - 4,480
1D4 - 5,600
5D3 - 4,160
5D2 - 4,608
7D - 4,960
Divide by half to get how many images can be taken with a 64GB UDMA card.
Before CF5.0 spec the max capacity was 256GB.
The cards that don't have UDMA 7 written on them are older and not UDMA 7. It's a huge difference in speed between them as you can see in my test. it's the same card but the older card was made before UDMA 7 existed.
They should look like Jim's pictures when you buy them. I buy most of my cards from Amazon.de and Amazon.uk. And they have stopped selling those Transcend UDMA 6 cards a long time ago.
I will probably not get the Lexar 800x and 1000x cards. The Lexar 1000x is maybe the fastest card you can buy. I have not compared it against the Transcend 1000x. The Lexar 800x is not much faster than the 400x cards. Only the read specs are 800x. The write speed is about 400x.
I would also belive there is a much larger difference between the 600x and 1000x cards when using the 1DX camera. That's my first impression when I have used them in my 1DX.