Does a 1066x CF card have speed difference to a 800x on a 5D Mark II?

[gaggelis]

Does a 1066x CF card have speed difference to a 800x on a 5D Mark II? Is there a limiting factor that I should have in mind in order to avoid unecessary expenses?

[MikeSowsun]

Both are very fast cards and I doubt you will see any difference.   This website shows the effective 5D Mk III write speeds obtained with various cards: http://www.robgalbraith.com/camera_wb_multi_page7de5.html?cid=6007-12452

133x = 20MB/s
200x = 30MB/s
266x = 40MB/s
300x = 45MB/s
333x = 50MB/s
400x = 60MB/s
600x = 90MB/s
666x = 100MB/s

700x=137MB/s
800x=120MB/s
900x=135MB/s

1000x=150MB/s
1066x=160MB/s

[gaggelis]

Thanks Mike, nevertheless I've been told that 5D Mark II's data throughput cannot reach such high speeds and therefore anything faster than 800x is useless. Any truth in that..?

[MikeSowsun]

If you look at the website link you will see that faster cards do give faster throughput in the 5D. But not at the rated card speed.

[gaggelis]

Mike this link is refering to 5D Mark III not Mark II...

[MikeSowsun · Accepted solution]

Sorry, I missed that in your first post. Here is the data for the 5D Mk II:    http://www.robgalbraith.com/camera_wb_multi_paged527.html?cid=6007-9784

(the drop down menu at the top lets you choose from many different cameras) 

With a 400x 60MB/s card the write speeds max out at about 30MB/s.

With a 1000x 150MB/s card the write speeds max out at about 50MB/s.