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.
Delkin Devices CF Express Power (512GB)
Read: 1450 MB/sec
Write: 1120 MB/sec
Sony Tough CF Express G (512GB)
Read: 1050 MB/sec
Write: 1050 MB/sec
ProGrade (Gold Bar 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.
Delkin Devices CF Express Power (512GB)
Read: 1450 MB/sec
Write: 1120 MB/sec
Sony Tough CF Express G (512GB)
Read: 1050 MB/sec
Write: 1050 MB/sec
ProGrade (Gold Bar 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.