J.Marcus Photo wrote:
Someone said in a video , all Sony cfe 2 tough cards are supported For 8k , sandisk 512 is but not 128 or 256. Makes no sense but has me confused.
I’d like to buy prograde cfe class B and be done with it but now I’m not sure.
Actually that’s something to look into because I know there’s some CFAST cards that support 4K shooting and some do not... which had nothing to do with the card capacity.
robert_in_ca wrote:
The only ProGrade CFexpress type b cards that I could find had a write speed of 1400 MB/s vs the SanDisk Extreme Pro which has a write speed of 1200 MB/s.
Do you have a link to the ProGardes that you seen?
garydavidjones wrote:
Sony is best in my opinion. Been using them on 1DX3.
Get Prograde reader
Some CFExpress cards are too slow for video I just read the Sony CFexpress Tough version supports 8K video.
Thanks Bobby. Did notice the Sony Tough actually maxes out to the spec of the R5 at 1480 MB/s whereas the ProGrade is only writes at 1400 MB/s - which isn't a big deal. However if the Prograde wasn't on sale I would opt for the Sony given it would be the same price.
robert_in_ca wrote:
Thanks Bobby. Did notice the Sony Tough actually maxes out to the spec of the R5 at 1480 MB/s whereas the ProGrade is only writes at 1400 MB/s - which isn't a big deal. However if the Prograde wasn't on sale I would opt for the Sony given it would be the same price.
Once you choose Prograde 512GB or above, it says Max Write Speed: 1500 MB/s
it might not matter to others but I liked that the sandisk and lexar (and 1 or 2 others) have "limited lifetime" warranties. I understand that to mean the card itself will be replaced at no charge if it fails 5-6 years after purcahse, though the mfr has no liability for the lost images, etc. I've heard good things about Prograde but their warranty is 3 years if I remember correctly. I've had one CF card failure in 18 years of shooting digital and sandisk replaced it (approximately 2012) without discussion of purchase date..
buddy duck wrote:
it might not matter to others but I liked that the sandisk and lexar (and 1 or 2 others) have "limited lifetime" warranties. I understand that to mean the card itself will be replaced at no charge if it fails 5-6 years after purcahse, though the mfr has no liability for the lost images, etc. I've heard good things about Prograde but their warranty is 3 years if I remember correctly. I've had one CF card failure in 18 years of shooting digital and sandisk replaced it (approximately 2012) without discussion of purchase date..
Do you want to bet that Prograde will be in business 5 years from now?
I purchased CF Express cards for the coming R5, and they arrived over the past few days. Three different types. I did the Black Magic Disk Speed Test to each and thought people might appreciate the results. This test does repeated read/writes to the card to simulate real world video file use.
Sony Tough CF Express G (512GB)
Read: 1050 MB/sec
Write: 1050 MB/sec
ProGrade (Gold Bar, apparently first generation, 256GB)
Read: 1250 MB/sec
Write: 950 MB/sec
The tests were performed about 10 times each. Card reader was a Sonnet reader with Thunderbolt 3.
The Sony card was abysmal, as it was the most expensive and claimed to be the fastest (1700/1480). The Delkin claimed 1730/1430 and wound up being the actual fastest by about 10 percent. The ProGrade with gold stripe is supposed to be 1600/1000. I have a ProGrade with black stripe (claimed 1600/1400) coming in and will add those results when it's tested.
For now, I'm giving this anecdotal crown to Delkin, which I know will drive certain forum members up the wall.
Just a note: the implied maximum post-buffer rate of fire for the R5 would seem to be more than the 20 frames per second the camera is rated for. If we assume that a file is 55mb, you'd get 26 frames per second from the Delkin card, if it were laying those files down perfectly efficiently.
Skeptical of this, I took a couple of the cards and some very large database files on my computer and started throwing them around, making copies, transferring, etc. With this sort of informal test I came out with a roughly 300mb/sec rate. I suspect this'll be closer to actual camera performance in taking stills past the buffer. That would imply about a 6 fps rate of fire after the buffer, which isn't too too bad. So, using the fastest of these cards, your performance is likely to be somewhere between 6 fps after the buffer is full and no (card) limit whatsoever.
I don't believe we've been told how much buffer is in the camera yet. We can sort of deduce it a bit by looking at their estimates of how many frames you can take before the buffer is full, but those calculations by Canon have traditionally been very conservative, assuming average card speeds. With the R5, the most useful figures they've provided for these calculations are that at 20fps, you can get 83 full raws before the buffer is full. Of course, during those 4 seconds of firing, your camera is pulling from the cache and placing those files on the memory card. If the camera were doing this at 3 frames per second with an average card, it would imply that the buffer was actually about 70 raws big.
Extrapolating that to performance with the Delkin card, we might expect it (using conservative 300mb/s performance measured by moving files to/from card) to give us a cached performance of 100 frames rather than the 83 the camera is rated for.
If you shoot with the mechanical shutter at 12 fps, the extra time it takes to take those frames is well-used by the cache to off-load images, giving the camera a roughly 140 frames of cache - in the unlikely event all my assumptions are correct.
If you haven't rolled your eyes and stopped reading by this point, you might be interested in the calculation of just how fast a CF Express card would need to be in real world performance to effectively make the cache irrelevant. Assuming file size of 55mb, that would be throughput of 660 mb/sec for the mechanical shutter mode and 1100 mb/sec for the electronic shutter. The CF Express standard has a theoretical limit of 2000 mb/sec, and existing cards more often than not claim performance higher than the required figures. Actual performance as measured by the Black Magic tool shows some cards already exceed goal, and some don't in reality. My own file copying test shows that none of the cards are quite there. I suspect actual performance once we get an R5 to test will be somewhere between those two test ranges, making careful card choice among these options more important than has been traditionally the case.
robert_in_ca wrote:
The only ProGrade CFexpress type b cards that I could find had a write speed of 1400 MB/s vs the SanDisk Extreme Pro which has a write speed of 1200 MB/s.
Do you have a link to the ProGardes that you seen?
I was looking at 64GB cards mentioned in the post I replied to and comparing them it was 800MB/s for Sandisk Write and 1400MB/s for Prograde (new 128GB version vs old 120GB version). As you get higher capacity cards the speeds do tend to increase and I hadn't noticed that the Sandisk gains a lot of ground quickly. Comparing 128 vs 128 we see 1200 vs 1400 which is meaningless.
But as Bobby pointed out, for an extra $25 and dealing with 45MP files, I'd be getting the 128GB Prograde without question over the 64GB SanDIsk.
all I know about prograde is they are new, at least I wasn't familiar with the name before 2020....some posters here on the forum like that the executives came from Lexar and promise high quality. beyond that I don't know if they are an 8 billion dollar diversified technology corp or if they are in a strip shopping center in central China. I do know that everything being equal (who knows when things are or are not equal) I would prefer a lifetime warranty on my expensive cards over a 3 year warranty--especially if the lifetime warranty was on a brand I thought had staying power.
I purchased CF Express cards for the coming R5, and they arrived over the past few days. Three different types. I did the Black Magic Disk Speed Test to each and thought people might appreciate the results. This test does repeated read/writes to the card to simulate real world video file use.
Sony Tough CF Express G (512GB)
Read: 1050 MB/sec
Write: 1050 MB/sec
ProGrade (Gold Bar, apparently first generation, 256GB)
Read: 1250 MB/sec
Write: 950 MB/sec
The tests were performed about 10 times each. Card reader was a Sonnet reader with Thunderbolt 3.
The Sony card was abysmal, as it was the most expensive and claimed to be the fastest (1700/1480). The Delkin claimed 1730/1430 and wound up being the actual fastest by about 10 percent. The ProGrade with gold stripe is supposed to be 1600/1000. I have a ProGrade with black stripe (claimed 1600/1400) coming in and will add those results when it's tested.
For now, I'm giving this anecdotal crown to Delkin, which I know will drive certain forum members up the wall.
Do you mind to get SanDisk Extreme, so we have full report . I have SanDisk but still waiting for Sony Reader ... but is not Thunderbolt 3, so your test could give us better view. Anyway great info
. I have SanDisk but still waiting for Sony Reader ... but is not Thunderbolt 3, so your test could give us better view. Anyway great info 
