As far as I know, the following from Dec2021 still holds wrt XQD vs CFExpress:
There's been recurring discussion about which CFExpress B cards since 2020 -
last year, and more recently wrt the Z9 and its more stringent constraints on getting sustained frame rates and for high spec video. The
technology is still evolving, so the SSD site seems to be a useful site to watch...
Ricci Chera of Nikon UK tested cards of several brands to finalize on Delkin Black and Power, and last week he said Angelbird are also suitable for fast/high volume video etc. Based on internet reports and tests etc, I see the storage arena using XQD-CFExpress in Nikon cameras to present in 4 universes:
1. Landscape etc - no worries continuing with XQD expect the technology is already obsolescent - hard to buy new, and CFExpress are wider investmnt. Obvioulsy older XQD cards have a higher risk of failing;
2. Stills using CFExpress - short bursts at most. The "slower" brands and types of CFExpress work well apparently provided emptying the camera buffer does not hit bottlenecks, which also heats up some of these cards - to as high as 70+ C! Subject to one's own testing CFExp cards such as Lexar Pro 64Gb are probably fine at this level in the Z9. IME Lexar Pro 64Gb work v well in the D850 and D5: latter card does not overheat shooting the D5 @12fps to fill the buffer;
3. Sustained still shooting for action eg BIF will reguire cards in the league of Delkin Black and Power and at least 128Gb, larger storage size may be preferable especially if aiming to start video;
4. 4k and 8K Video recording high resolution RAW demands high end CFExp B ie 2Tbyte Delkin and Angelbird. Clearly, the Z9 is the first ILC designed to capture marketshare in this ecosystem. With none of its own high end cinema spec cameras to protect from Z9 cannibalism, Nikon is targeting what has previously been the more expensive high end universe of cinematography ie RED cameras etc.
There was also overheating issues with some cards worked hard in a Z9 ie video, serious buffer usage:
I wanted to get some thoughts on CF express cards and what brands you have the best luck with. I have continued to use the XQD cards and they have worked flawlessly with both of my generation 2 z bodies. Hypothetically speaking, if I were to purchase Z9 and not planning on doing video, would...
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