How big are RAW files on 5d mark II at 1880x940

[bastogne]

I'm doubting whether to buy a 128gb 1050x KB or a 64gb KB. I read the 64 ones are faster in general.

How many minutes can you shoot on a 64 gb card ?

[reddeercity]

I'm doubting whether to buy a 128gb 1050x KB or a 64gb KB. I read the 64 ones are faster in general.
How many minutes can you shoot on a 64 gb card ?

From what I have read yes 64GB KB card are faster then 128GB and from my experiences 32GB cards are even Faster then the 64GB
at least with my Lexar 1000x cards.
Here a the formula to calculate data rate :  "Raw data rate (MB/s) = W x H x 14 x FPS / (8 x 2^20)"
So you need about 70.7 MB/s if my math is right that is
So depending on your card of choice with 64GB you should get around 13-15 minute at 1880x940 at 23.976
with Raw MLV v2.0 1872x936 23.976p plus Audio, 19,931 frames/13:51 Min. 60GB 73.3MB/s from my 5D2
With Lexar 64GB 1000x card