CF Card Speed
 

So, how fast of cards do we need?

Will the Lexar Professional 400x work?

http://www.bhphotovideo.com/c/product/824191-REG/Lexar_LCF32GCTBNA4002_32GB_Professional_400x_Compact.html
This is what i've been using with my 5d for years.

Re: CF Card Speed
 

I'm getting 4 of these. First of all, I only shoot SanDisk. And with redundant recording, 64 and 128gb cards are now an option. With 4x 64GB that's 340 minutes of redundant recording.

http://www.bhphotovideo.com/c/product/646880-REG/SanDisk_SDCFXP_064G_A91_64GB_Extreme_Pro_CompactFlash.html

Re: CF Card Speed
 

Bellow is a chart with supported cards.
But I guess any UDMA CF card with more then 45MB/Sec should work.

I'm going to use

1x Transcend CompactFlash Ultimate Card 600x, 32GB
4x SanDisk Extreme Compact Flash, 400x, 60MB/s, 32GB

Re: CF Card Speed
 

I think it is best to refer directly to Canon's EOS C300 FAQ.

Canon DLC: Cinema EOS Frequently Asked Questions

Clearly, the Sandisk CF cards are the only ones that have been thoroughly tested and support overcranking.

Cheers,

Re: CF Card Speed
 

This thread hasn't been updated in a while and I was just second guessing myself so I thought I'd craft a post here about it.

This is my main question:
Does this work for all frame rates on the C300: SanDisk 64 GB Extreme MFR # SDCFXS-064G-A46?

Not recommended for all frame rates on C300:
Delkin Devices 64GB CompactFlash Memory Card 700x UDMA: about $75
MFR # DDCF700-64GB
64GB Data Storage Capacity 700x Speed Rating
Read Speed: 105MB/s
Write Speed: 67MB/s
UDMA 6 Compliant Made in the U.S.A. Lifetime Warranty

Recommended for all frame rates on C300:
Delkin Devices 64GB CompactFlash 1000x UDMA Memory Card: about $99
MFR # DDCFCOMBAT1000-64GB
64GB Data Storage Capacity 1000x Speed Rating
Read Speed: 150MB/s
Write Speed: 80MB/s
UDMA 7 Compliant Supports Rapid-Fire RAW Shooting

Recommended for all frame rates on C300, but pricey, there is an offload speed benefit to these cards though…
SanDisk 64GB Extreme Pro CompactFlash Memory Card (160MB/s): about $150
SDCFXPS-064G-A46
64GB Storage Capacity Optimized for 4K Video Recording
Up to 160MB/s Read Speed
Up to 150MB/s Write Speed

Does this work for all frame rates on the C300?
SanDisk 64 GB Extreme CompactFlash Memory Card: about $90
MFR # SDCFXS-064G-A46
64GB Storage Capacity
Read Speed up to 120 MB/s
Write Speed up to 85 MB/s
UDMA 7 Compliant

Additional options (Toshiba / Transcend)

Toshiba EXCERIA Flash memory card - 64 GB CompactFlash
MFR# PFC064U-1EXS
1000X / 120MB/s write

Transcend 1000 X look good at 32GB and above, that 16GB is slower.
MFR # TS64GCF1000
Read 160 MB/s, Write 120 MB/s (32~128GB);
Read 160 MB/s, Write 70 MB/s (16GB)